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Modern Monetary Theory Is Too Good To Be True

By Ross GuestGriffith University
Modern Monetary Theory Is Too Good To Be True 101
Source: Adobe/Yulia Lisitsa

The Australian government is planning to spend AUD 190 billion (USD 132 billion) to support the economy in response to COVID-19, according to the latest Parliamentary Budget Office estimate.

The total impact of COVID-19 on the government’s net debt, including both revenue impacts (down, because of less activity) and spending impacts (up because of spending to support the economy) amounts to between 11% and 18% of gross domestic product, or AUD 500 billion to AUD 620 billion.

Modern Monetary Theory Is Too Good To Be True 102
Parliamentary Budget Office

The estimates are based on the three possible scenarios developed by the Reserve Bank: “downside”, “baseline” and “upside”. Each differ in their assumed timing of the relaxation of social distancing and other restrictions, and for how long uncertainty and diminished confidence weigh on households and business activity.

With similar blow-outs around the world, a view gaining ascendancy, including amongst commentators such as Alan Kohler, is that government debt doesn’t matter – provided the government owes the money to its central bank (in Australia’s case, the Reserve Bank) or the bank is prepared to buy the debt from the party the government borrowed the money from.

The view is an application of so-called modern monetary theory and the argument goes like this:

  1. when the government runs a budget deficit, it borrows from the private sector (mainly financial institutions) by selling government bonds which are effectively IOUs offering to repay in a certain number of years and offering interest at a low bond rate until then

  2. the Reserve Bank (along with other central banks) has been buying bonds from the private sector with money it creates, and says it is prepared to buy as many as are needed to keep the bond yield low, so that if it looks as if the bond rate will rise, much of the debt will ultimately be owed to the bank

  3. when the bonds expire and it is time to repay the debt, the government can simply issue more bonds which the bank will ultimately buy if it has to in order to keep the bond rate low

  4. if down the track all of the extra money in the banking system causes inflation, the process would be thrown into reverse, slowing down inflation.

It sounds too good to be true, because it is.

There are a number of reasons why deficits and debt do matter, even if the debt is effectively owed to the central bank and even if it has been created in a recession, or in anticipation of one – as is the case for the COVID-19 response.

Creating money carries risks

We know that governments with high debt face interest rate premiums from lenders. A European Union study found that a 10 percentage point increase in the government debt to GDP ratio increased the sovereign bond rate by 0.47 percentage points.

These higher risk premia flow on to private sector borrowers whose interest rates are set in relation to sovereign interest rates, so all households and businesses face higher rates. The result will be less investment and household spending than there would otherwise be.

An attempt by the central bank to negate the risk premium by buying more bonds would allow the government to issue even more bonds, increasing the risk of inflation which would itself put upward pressure on interest rates.


Read more: Explainer: what is modern monetary theory?


The experience of Latin American countries that relied on their central banks to create money is frightening. Argentina and Venezuela in particular experienced inflation rates of up to 50% and plummeting exchange rates.

The idea that, if and when inflation arrives, the Australian government could easily throw its spending and tax engines into reverse is fanciful. It is politically difficult to wind back government spending and raise taxes. To do so on a large scale might be impossible.

Modern Monetary theorists respond by pointing out that we have not yet seen inflation in Western countries that have pumped up their money supplies.

That’s true, but while the government has been running up debt, we have seen inflation of a sort in big increases in asset prices in housing and stock markets.

It has made us more vulnerable to financial shocks and priced many first home buyers out of the market.

Markets aren’t forgiving

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Markets aren’t always forgiving.

And what if the foreign exchange market does not buy the modern monetary theory story?

Even the expectation of future inflation by the market, before it arrives, could lead to a depreciation of the Australian dollar which could itself create inflation which would make Australians poorer.

A final point: the Reserve Bank of Australia is independent from the government.

If confidence in this independence was eroded, we could see an increase in perceived risk of holding Australian financial assets. This, in turn, would cause higher interest rates and a lower Australian dollar.

In any case, the Reserve Bank might decide at some point that the risk of inflation or asset price inflation is unacceptable and refuse to buy more government bonds, or sell back to the private sector the bonds it’s bought.


Read more: Vital Signs. Do deficits matter any more?


This would mean the government debt was owed to the private sector once again. Financial markets might view it as riskier than debt owed to the bank, with negative consequences for interest rates and the exchange rate.

I am inclined to agree with the International Monetary Fund’s chief economist who said in relation to modern monetary theory before the COVID crisis that there was “no free lunch”.

Martin Wolf of the Financial Times said during the crisis that modern monetary theory was both right and wrong.

It was right, because there is no simple budget constraint. It was wrong, because it would prove impossible to manage the economy sensibly once politicians believed there was no simple budget constraint.The Conversation

Ross Guest, Professor of Economics and National Senior Teaching Fellow, Griffith University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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