The Paradox of Thrift

If one person saves half of their paycheck, their bank balance grows nicely. Tightening your belt to prepare for an uncertain future and build a nest egg is a perfectly smart choice for an individual.

But suppose everyone in town stops eating out and stops buying clothes at the same time. Something very different happens. The local restaurant owner and the clothing store owner see daily sales cut in half. With customers gone, they have to lay off workers or cut pay.

The neighbors who lose their jobs or take a pay cut now have even less money, so they cut spending even harder. One person's spending is another person's income. Because of that link, when everyone closes their wallets at once, the flow of money through the whole economy breaks down like falling dominoes.

Economists call this the fallacy of composition: the mistaken belief that what is good for one person must be good for everyone. The paradox of thrift is the classic example. What works for the part does not always work for the whole.

When goods go unsold and inventory piles up in warehouses, factories and companies get hit hard too. They stop hiring and stop building new plants all at once. When businesses stop investing, the suppliers of raw materials and the construction companies lose their orders one after another.

When the power to actually pay for goods (effective demand) dries up, the gears of the economy seize. People whose incomes have dropped feel even more anxious about the future, so they hide away whatever money they have left.

As the nation's total income shrinks, a strange thing can happen: even if people raise the share of income they save, the total amount actually saved may not grow, or may even fall. Everyone just wanted to get richer by being frugal, and instead they all fall into a trap of getting poorer together.

With no one to buy their products, companies don't want to borrow and invest. People hold on to their cash instead of spending it. Money stops circulating through the economy.

To be more precise, this does not mean saving is a bad thing. The role of saving changes completely depending on what the economy is going through.

In a boom, when factories are running nonstop and workers are scarce, saving is a great foundation. The money people put in banks flows to companies for new equipment and technology, which builds the economy's underlying strength.

In a severe slump, with jobs disappearing and factories idling, too much saving can push the economy into an even deeper hole. Keynes argued that when private spending stops and goods go unsold, the government should increase its spending to create jobs and fill the gap in demand. That said, economists hold a range of views on how well this works and what side effects it has.

In the end, balance is what matters. When the economy is hot, saving is fuel for growth. When it is frozen, reasonable spending is the oil that keeps a sputtering engine turning.