Modern Monetary Theory

Posted to: DEV; Hacker News; Twitter

This is written from a UK perspective, as I’m British. It’s basically notes for a talk I’m going to give tomorrow, and probably the largest block of the audience is from the UK. But the points here apply to any country with its own central bank, and especially to the US Federal Reserve.

The “need” for Austerity

The common story of government spending is:

This is why we needed austerity. “There is no magic money tree”. If we didn’t tighten our purse-strings and massively scale back social support, the country would go bankrupt. This is why we “needed” to cause over 120 thousand excess deaths in underfunding the NHS, and engineer the first drop in life expectancy in 40 years (before COVID).

Why not MMT?

Modern Monetary Theory says this story is complete nonsense - there is a magic money tree:

There is significant evidence to support this (or, according to Richard Murphy, it’s an indisputable fact):

MMT says that the Bank of England is wholly owned by the government of the UK. The Bank of England is the creator and guarantor of all sterling. So the government can simply create money as needed.

An allegory

The best explanation I’ve read of how this works comes from Cory Doctorow (as so many great things do). In “Moneylike”, Cory is actually making the argument that the reason money is needed in the first place is to settle some liability. And that liability is traditionally tax. People need money to pay tax, this is why money exists, and why they need the state to provide it for them:

Sometimes when Mosler is explaining money to an audience, he’ll hold up a handful of his business-cards and ask, “Who will stay after the lecture and help stack the chairs and mop the floor in exchange for one of my cards?

When no hands go up, Mosler adds, “What if I told you that there were gun-toting security guards at the all the exits, and they will only let you leave in exchange for one of my cards?”

Every hand shoots up.

Mosler has just turned his cards into money, through the creation of a non-discretionary door-tax.

Now, Mosler didn’t need to get his business-cards from the audience before he could levy this tax. He is the sole supplier of his cards, and while the audience will treat them as money, Mosler won’t. Mosler doesn’t need business-cards — he needs people to help clean the lecture hall and stack the chairs. At the end of the night, when the security guards turn over all the collected cards to him, he doesn’t need them — he can’t pay for his airfare to the next lecture using his cards, or pay for his hotel room with them. Indeed, given how cheap business cards are to produce, he can just dump all those used cards in a shredder.

When people say, “Government budgets aren’t like household budgets,” this is what they mean. Mosler isn’t a currency user in this thought-experiment, he’s a currency issuer. Mosler needs your work, not your “money.” He has all the money (Mosler’s business cards). You can’t get money (Mosler’s business cards), except from Mosler. When you pay your door-tax to Mosler’s armed agents, you aren’t giving him your money — you’re giving him his own money back.

(As an aside, the actual point of Cory’s article is to argue that cryptocurrency isn’t really very “moneylike” because there’s no liability that you need crypto to fulfil. This is why it remains a speculative asset. And the reason those who push Web 3 want it so badly is because it would provide a liability to justify the existence of Crypto. You’d need Crypto to access the Internet. An internet tax.)

How money is created

The mechanisms of government spending are complicated. Unnecessarily so. This is financial theatre.

How government finances spending:

Implications of MMT

This really matters

Under successive Conservative governments, and even the under New Labour to a lesser extent, public spending has been tight, leaving people to fend for themselves. This has caused a huge amount of suffering (and a loose labour market where corporations have all the power).


Times they are a-changing somewhat:

UK central bank becomes first in the world to adopt direct monetary financing to fund government spending during the coronavirus crisis

I think it’s quite possible that the rise in acceptance of MMT (even though it’s still not mainstream) genuinely helped governments across the world justify spending large amounts of money on COVID measures and relief. Of course it could have been better, but it could also have been much worse.

However, even Labour are still peddling the “no magic money tree” line.

Some great resources on this


Banks create money out of thin air

How money is created

When licensed banks lend money, they create it out of thin air by simply writing number in your account. They only keep a fraction of the funds they lend out in reserve. This fraction is defined through legislation, differently for each central bank.

The ECB is in trouble

The same theory is broadly true even for the European Central Bank, but because the ECB sets the financing restrictions for 19 countries, this is fraught with peril and conflict. Especially during times of need like COVID. The ECB has a problem.

By @nottrobin