Whatever happened to the government debt doom spiral

A number of people, including the occasional economic journalist, are puzzled about why government debt at 90% of GDP seemed to cause our new Chancellor and the markets so little concern when his predecessor saw it as a portent of impending doom. I always argued that this aspect of austerity had a sell by date, so let me try to explain what is going on.

The 90% figure comes from a piece of empirical work which has been thoroughly examined, and found to be highly problematic. (Others have used rather more emphatic language.) Part of the problem is a lack of basic thinking. Why should the markets worry about buying government debt, beyond the normal assessment of relative returns. The answer is that they worry about not getting their money back because the government defaults.

If a government cannot create the currency that it borrows in, then the risk of default is very real. Typically a large amount of debt will periodically be rolled over (new debt sold to replace debt that is due to be paid back). If that debt cannot be rolled over, then the government will probably be forced to default. Knowing that, potential lenders will worry that other potential lenders will not lend, allowing self fulfilling beliefs to cause default even if the public finances are pretty sound.

The situation is completely different for governments that can create the currency that the debt they sell is denominated in. They will never be forced to default, because they can always pay back debt due with created money. That in turn means that lenders do not need to worry about forced defaults, or what other lenders may think, so this kind of self fulfilling default will not happen.

Of course a government can still choose to default. It may do so if the political costs of raising taxes or cutting spending is greater than the cost of defaulting. But for advanced economies there is an easier option if the burden of the public finances gets too much, which is to start monetising debt. That is what Japan may end up doing, and what others may also do if QE turns out to be permanent. But this is a very different type of concern than the threat of default. And it does not, in the current environment, lead to the emergence of large default premiums and market panics.

How can I be so sure? Because with QE we have had actual money creation, and it has not worried the markets at all. It seems hard to tell a story where markets panic today about the possibility of monetisation in the future, but are quite sanguine about actual monetisation today.

So for economies that issue debt in currency they can create, there is no obvious upper limit anywhere near to current debt/GDP ratios when economies are depressed and inflation is low. Japan shows us that, and we must stop treating Japan as some special case that has no lessons for the rest of us. (How often did we hear of their lost decade in the 1990s that it couldn’t happen anywhere else.)

It was good that the IFS suggested Hammond has a look at Labour’s fiscal rule. As I explained in this post, Hammond’s new ‘rule’ is pretty worthless. But one key part of Labour’s rule that keeps being ignored but is crucial in today's environment is the knockout if interest rates hit their zero lower bound. It is for the reasons described above that this knockout is there and is perfectly safe: when interest rate policy fails you can completely and safely forget the deficit and debt and use fiscal policy to ensure the recovery. It is the basic macro lesson of the last 6 years that is fairly well understood among academic economists but still remains to be learnt by most people who talk about these things. Whether senior economists in the UK Treasury need to learn it or just keep quiet about it for other reasons I do not know.

Fiscal rule redux

Although this discussion is about the UK, the macroeconomic issues involved apply equally elsewhere.

Most of the media discussion of Labour’s new fiscal rule presented before the budget focused on the commitment to balance the current budget. The media did this because ‘the hook’’ was the similarity between this aspect of the rule and the rules proposed by Brown or Balls. As I noted at the time, no one in the media seemed to want to compare this goal to the Chancellor’s overall surplus objective, which remains rather extraordinary.

In some ways this element is the least interesting part of the rule. Two other key parts are that current balance is a rolling five year target, and the knockout if interest rates hit their zero lower bound (ZLB). Both are more difficult to explain quickly in a mediamacro world where the deficit is considered all important, although at least with the rolling 5 year target a quick response is that the coalition government adopted exactly that form of target. If they had adopted the less flexible target of current balance by 2015, the economy would have been even more screwed by austerity than it actually was.

The really new feature of the rule is the knock out. (This was described as a ‘loophole’ by one political reporter: mediamacro again.) The rule is deliberately suspended to allow for fiscal stimulus when interest rates hit their ZLB. How much stimulus? Whatever it takes to get interest rates to rise above the ZLB. In Portes and Wren-Lewis we suggest the Bank of England are the obvious people to advise on this (the size of stimulus, not its form in terms of spending increases or tax cuts). The focus of fiscal policy switches from deficit control to stabilising demand, but only because monetary policy can no longer do that job effectively.

If such a rule had been in operation during the Great Recession, we would have seen a continuation of the fiscal stimulus we saw in 2009 into later years. That would have meant, for sure, that government debt would have risen by more than it did, but it would also have meant, for sure, that output would have recovered more quickly. What would have happened to the debt to GDP ratio we cannot know for sure, but the important point is that this does not matter.

It is this last point which is the most difficult to convince people about in the mediamacro world. In this (imaginary) world, we have to worry about the deficit because if we do not there might be a financial panic, with interest rates on government debt rising and perhaps even an inability to sell that debt. The best response to this concern is it would not matter even if it happened, because the Bank of England would buy the debt and keep interest rates on that debt down. Of course the market panic scenario will not happen anyway, because there is zero chance that the government will default, but trying to convince people that the financial markets will behave rationally after the global crisis is hard.

Many non-economists think creating money to cover the deficit sounds outlandish, until you point out it is already happening with QE. The potential size of the QE programme is unlimited. The whole point of QE is to keep long term interest rates, like the interest rate on government debt, low. QE happens when short interest rates are at their ZLB. That it why, when rates are at the ZLB, fiscal policy can focus on stimulating the economy. [1]

There are some who think that any kind of fiscal rule represents appeasement of the austerity position. As I discussed in my post on MMT, I do not think that is very good economics, particularly for a party (like Labour) that is committed to maintaining an independent central bank that uses monetary policy to stabilise demand. In that regime, when you are not at the ZLB, deficit bias is a potential problem. I think intergenerational fairness is important, and we shouldn’t ignore it just because the argument is misused to support austerity. I am reminded of this every time I look at Norway, and recall how Mrs. Thatcher effectively used oil revenues to cut taxes rather than build up a sovereign wealth fund. There is a certain irony that George Osborne’s current policy of going for surplus, while totally wrong for today, would have been the right policy in the late 80s and 1990s.

Ellie Mae O'Hagan recalls how many on the left (in my recollection all shades of the left) argued that when austerity started to bite there would be a popular revolt against the policy. That did not happen, in part because of mediamacro, but also because there was not a clear alternative to unite behind. Labour tried to have it both ways, expressing worries about what austerity was doing but also agreeing that the deficit was a current concern. In Labour’s new fiscal rule we have a policy that sets out clearly how we should deal with any new crisis, and also how we should have dealt with the last one. It is a policy the left should unite behind, because overcoming mediamacro’s obsession with deficits will not be easy.

[1] You can only do this if the government controls the currency its debt is issued in. When that does not happen, as many developing countries have found to their cost, you do have to worry about the bond markets. That was exactly the problem that led to the Eurozone crisis, until the ECB came up with OMT.

A more elaborate argument for countries that do borrow in their own currencies is that a market panic over government debt would be accompanied by a run on the currency. Paul Krugman tackles this, but following discussions with the FTs Martin Sandbu I do plan to discuss this issue further at some point.  

A (much) better fiscal rule

Today the Labour Shadow Chancellor John McDonnell will give a speech where he puts forward an alternative fiscal rule to George Osborne’s fiscal charter. It involves a rolling target for the government’s current balance: within 5 years taxes must cover current spending. It leaves the government free to borrow to invest. Investment cannot be unbounded, as there is a commitment to reduce debt relative to trend GDP over the course of a parliament.

No doubt we will hear the usual cries from the opponents of sensible fiscal rules: Labour plan to borrow billions more than George Osborne and they plan to go on borrowing forever. The simple response to that should be that it is right to borrow to invest in the country’s future, just as firms borrow to invest in capital and individuals borrow to invest in a house. Indeed, with so many good projects for the government to choose from, and with interest rates at virtually zero, it is absolute madness not to investment substantially in the coming years.

This part of the rule is similar to the main fiscal rule Osborne himself adopted under the Coalition, which in turn is not unlike previous rules adopted by Labour. What is new is that McDonnell’s rule involves what could be termed a ‘zero lower bound knockout’: if interest rates hit their lower bound following a recession, the focus of fiscal policy shifts from deficit targets to helping monetary policy support the economy. It reflects the knowledge we have gained since the global financial crisis.

Again critics will claim that the knockout would have meant building up even more debt after the last recession. But what matters with debt is its relationship to GDP, and it is far from clear whether more stimulus in 2009 and 2010 would have increased the debt to GDP ratio, because you are increasing GDP as well as debt. But even if debt to GDP did rise, this reflects the right choice. It means prioritising the real economy - jobs and wages - over an obsession with government debt.

We will no doubt be told by government supporters that this would have led to financial disaster, just as we are also told that the coalition saved us from disaster. We will be told this by some economists working in the financial sector - a sector that created the Great Recession. But there is no evidence for this impending disaster, and plenty of evidence that it is a complete myth. As Paul Krugman might say, in a country with its own central bank the bond vigilantes just keep failing to turn up.

Recessions come and go, you might respond, but higher debt will always be with us. That ignores two key points. First, prolonged and deep recessions cause lasting damage. UK GDP per head is currently over 15% below pre-recession trends. Does none of that have anything to do with the slowest UK recovery from a recession in centuries? Second using fiscal policy to end recessions quickly does not mean higher debt forever. The key point is that debt can be reduced once the recession is over and interest rates are safely above their lower bound. Doing that will be no cost to the economy as a whole, as monetary policy can offset the impact on demand. Obsessing about debt during a recession, by contrast, costs jobs and reduces incomes, as every economics student knows and as the OBR have shown.

The rule happens to mean that pretty well all of the additional austerity Osborne has detailed since the election is unnecessary. But that is a byproduct of adopting a sensible rule. If there is any ‘reverse engineering’ going on, it is with the fiscal charter, which some argue was adopted with the political purpose of making Labour look less prudent before the election. As McDonnell notes, no economist has attempted to defend Osborne’s fiscal charter.

Yet I know this point worries some Labour MPs and commentators. They say, quite rightly, that one of the main reasons the 2015 election was lost was because Labour were not trusted on fiscal policy. But the basic truth is that you do not enhance your fiscal credibility by signing up to a stupid fiscal rule. Apart from getting attacked for doing so by people like me, your collective heart is not really in it and it shows. You get trapped into proposing to shrink the state as Osborne is doing, or hitting the poor as Osborne is doing, or raising taxes which makes you unpopular. And if by chance it ever looks like you might be getting that trust back, Osborne or his successor will move the goalposts again.

The far more convincing way to get trust back is to adopt a fiscal rule that makes sense to both economists and the public (‘only borrowing to invest’), and actively talking about it. When the Conservatives accuse you of borrowing, you do not try and change the subject, but remind people that is what firms and consumers do. Borrowing is not a dirty word, particularly when it is on vital investment and you can do it for almost nothing! Indeed borrowing to invest shows you are optimistic about the future and are prepared to do things to make it better. In contrast those who would turn down these investment projects in order to reduce debt as fast as possible have a negative outlook that fears the future.

The Conservatives know they are vulnerable on public investment. Osborne tries to give the impression that he is doing a lot of it, but the figures do not lie. In the last five years of the Labour government the average share of net public investment in GDP was over 2.5%. During the coalition years it fell to 2.2%, and for the five years from 2015 it is planned to average just 1.6%. That is not building for the future, but putting it in jeopardy, as those whose homes have been flooded have found to their cost.[1]

[1] Besides cutting spending on flood prevention while part of the coalition, Damian Carrington revealed yesterday that UK funding for research on flooding has been cut by 62%! There can be no better indication of the madness of George Osborne’s deficit obsession.