First, the situation for both borrowers and investors looks increasingly dire.

A new report from Congress’s Joint Economic Committee predicts that there will be two million foreclosures on subprime mortgages by the end of next year. That’s two million American families facing the humiliation and financial pain of losing their homes.

At the same time, investors who bought assets backed by subprime loans are continuing to suffer severe losses. Everything suggests that there will be many more stories like that of Merrill Lynch, which has just announced an $8.4 billion write-down because of bad loans — $3 billion more than it had announced just a few weeks earlier.

Second, much if not most of the subprime lending that is now going so catastrophically bad took place after it was clear to many of us that there was a serious housing bubble, and after people like Mr. Gramlich had issued public warnings about the subprime situation. As late as 2003, subprime loans accounted for only 8.5 percent of the value of mortgages issued in this country. In 2005 and 2006, the peak years of the housing bubble, subprime was 20 percent of the total — and the delinquency rates on recent subprime loans are much higher than those on older loans.

Image Paul Krugman Credit... Fred R. Conrad/The New York Times

So, once again, why was nothing done to head off this disaster? The answer is ideology.

In a paper presented just before his death, Mr. Gramlich wrote that “the subprime market was the Wild West. Over half the mortgage loans were made by independent lenders without any federal supervision.” What he didn’t mention was that this was the way the laissez-faire ideologues ruling Washington — a group that very much included Mr. Greenspan — wanted it. They were and are men who believe that government is always the problem, never the solution, that regulation is always a bad thing.