The meme that is destroying Western civilisation—Part III(cont.)
STEVE KEEN
JUL 05, 2024
Yesterday’s UK election has repeated the pattern of the last 40 years: a Neoliberal-Heavy Party—the Conservatives—have lost in a landslide to a Neoliberal-Lite Party—Labour. The victor will set about implementing the same economic policies as the party it routed, but more nicely.
Jeremy Corbyn—the previous anti-Neoliberal leader of the Labour Party, who held onto his seat as an independent, after Labour’s current pro-Neoliberal leader Kier Starmer banned him from standing for Labour—put the election result in context when he commented that
Labour “has put forward a manifesto that is thin to put it mildly, and doesn’t offer a serious economic alternative to what the Conservative government is doing.”The root problem, as I noted in my previous post (Substack;Patreon), is that both parties—and almost all of the bureaucracy, the media, and economic thinktanks, as a reader pointed out—have Neoliberalism “embedded in them”. They all think that Marshall’s meme of intersecting supply and demand curves describes how the real-world works. So, despite vast differences between political parties on issues like culture and immigration, when it comes to the economics, all you get is a different brand of the same old breakfast cereal.
It's the breakfast cereal that is the problem.
The easiest place to prove that supply and demand analysis is false is the area where its application does the greatest harm:
the belief, derived from supply and demand analysis, that the government borrows from the private sector when it runs a deficit, and that, therefore, a deficit reduces total savings.
Here’s the way that
Mankiw’s Macroeconomics textbook** puts it: there’s a stock of money that people have saved—shown by the line labelled S1. A government deficit takes some of that, leaving less for investment by the private sector—shown by the line labelled S2.
(graph)
Mankiw explains that the move from S1 to S2 is caused by government spending exceeding taxation:
the government finances the additional spending by borrowing—that is, by reducing public saving. With private saving unchanged, this government borrowing reduces national saving. As Figure 3-10 shows, a reduction in national saving is represented by a leftward shift in the supply of loanable funds available for investment… the increase in government purchases causes the interest rate to increase and investment to decrease. Government purchases are said to crowd out investment. (Mankiw 2016, p. 73)
If this were true, then it should be easy to show by looking at bank accounts, since the vast majority of our savings today is in the form of bank deposits, rather than cash. Even if you’ve put your own money into stocks and bonds, that money is still in bank deposit accounts: it’s just in the bank deposit accounts of stockbrokers and pension funds, rather than your own.
Mankiw claims that a government deficit moves the savings curve to the left: it reduces Deposits. A government Deficit is the difference between government spending and taxation, and both spending and taxation operate through bank deposit accounts. Government spending increases bank deposit balances; taxation reduces them. So, what happens when the government runs a deficit; what happens when government spending exceeds government taxation? Bank deposits rise:
a deficit doesn’t reduce the stock of savings, it increases them.In other words, Mankiw’s textbook (and all other mainstream economics textbooks) moved the supply curve the wrong way: he should have shown that the deficit increases savings.
(graph)
Why does the textbook get it wrong? Partly because the supply and demand diagram is just a drawing: you can draw a line on it anywhere you like. To know where you should draw the line, you have to know how whatever you’re talking about—be it breakfast cereal or money—is created. Mankiw might ultimately be right in his claim that government borrowing imposes “an unjustifiable burden on future generations” (Mankiw 2016, p. 557), but you’ll never know by drawing lines on a diagram. You have to look at how money is created—and that involves the potentially dry and boring topic of double-entry bookkeeping, which I’ll discuss in the next post.
**Mankiw, N. Gregory. 2016. Principles of Macroeconomics, 9th edition (Macmillan: New York).