While you can’t believe a word that comes out of John McCain’s mouth these days, I really want to believe this economist from the University of Chicago:

“The idea is that banking is so central to the American economy that the government is justified in virtually nationalizing much of the industry in order to save us from a potential depression.

There are two faulty assumptions here. First, saving America’s banks won’t save the economy. And second, the economy doesn’t really need saving. It’s stronger than we think.

Bear with me. I know that most everyone has been saying for a couple of weeks that something has to be done; a banking crisis could quickly become a wider crisis, pulling the rest of us down. For this reason, the Wall Street bailout is supposed to be better than no plan at all.

Too bad this line of thinking is seriously flawed. The non-financial sectors of our economy will not suffer much from even a prolonged banking crisis, because the general economic importance of banks has been highly exaggerated.

Although banks perform an essential economic function — bringing together investors and savers — they are not the only institutions that can do this. Pension funds, university endowments, venture capitalists and corporations all bring money to new investment projects without banks playing any essential role. The average corporation gets about a quarter of its investment funds from the profits it has after paying dividends — and could double or even triple that amount by cutting its dividend, if necessary.

What’s more, it’s not as if banking services are about to vanish. When a bank or a group of banks go under, the economywide demand for their services creates a strong profit motive for new banks to enter the marketplace and for existing banks to expand their operations. (Bank of America and J. P. Morgan Chase are already doing this.)

It’s important to keep in mind, too, that the financial sector has had a long history of fluctuating without any correlated fluctuations in the rest of the economy. The stock market crashed in 1987 — in 1929 proportions — but there was no decade-long Depression that followed. Economic research has repeatedly demonstrated that financial-sector gyrations like these are hardly connected to non-financial sector performance. Studies have shown that economic growth cannot be forecast by the expected rates of return on government bonds, stocks or savings deposits.

It turns out that John McCain, who was widely mocked for saying that “the fundamentals of our economy are strong,” was actually right. We’re in a financial crisis, not an economic crisis. We’re not entering a second Great Depression.”