Nevertheless, the outrage is both understandable and useful. Public money has been put at risk to calm a storm on Wall Street while ordinary people are losing their homes. The public is crying, “What about us?” and politicians are listening, as they should.

Image Credit... David Suter

Like the failure of a financial behemoth, spreading foreclosures engulf the innocent as well as the imprudent and unwise. To be sure, many homeowners were shortsighted and greedy. Like their Wall Street counterparts they borrowed too much and got caught when the music stopped. Like the Bear Stearns shareholders, they should take losses. But putting them out of their homes does not merely harm them and their children, it endangers whole neighborhoods and drags down the assets of their more prudent neighbors.

Congress and the Bush administration should move quickly  as they proved they could with the rapid passage of the stimulus package  to enact laws to ease the renegotiation of mortgages and keep homeowners who are able to pay the new charges in their homes. Public money will have to be put at risk, but it is worth it. The deals should be structured so that the taxpayer shares in the gains if markets recover and the properties or mortgages are later sold at a profit.

When the immediate crisis is past, however, we must turn to the difficult task of reducing the chances of a replay. It will not be easy to design regulations that do more good than harm, but at the very least all financial institutions that stand to benefit from Federal Reserve help in a crisis must be subject to regulatory scrutiny to make sure they are managing their risk prudently. There must be higher capital requirements and limits on excessive leverage. If the rules are reasonable, we should not weep if a few high fliers choose to move their operations to other countries with laxer rules. Our markets will be better off without them.

After that, we must take on the even harder job of sorting through the explosion of financial instruments that have proliferated in the boom and deciding which belong in our kit of tools and which should be relegated to the waste heap. If they genuinely spread risk and help move capital into more productive uses, they should stay. But some exotic derivatives seem mainly to reflect the efforts of traders to outsmart each other. Their opaqueness may entail more systemic risk than social value.