For subprime and other non-prime loans, which account for more than half of all foreclosures, the best thing to do for the homeowners and for the bondholders is to write down principal far enough so that each homeowner will have equity in his house and thus an incentive to pay and not default again down the line. This is also best for taxpayers, who now effectively guarantee the securities linked to these mortgages because of the various deals we’ve made to support the banks.

For these non-prime mortgages, there is room to make generous principal reductions, without hurting bondholders and without spending a dime of taxpayer money, because the bond markets expect so little out of foreclosures. Typically, a homeowner fights off eviction for 18 months, making no mortgage or tax payments and no repairs. Abandoned homes are often stripped and vandalized. Foreclosure and reselling expenses are so high the subprime bond market trades now as if it expects only 25 percent back on a loan when there is a foreclosure.

The taxpayers need not and should not be responsible for making up the difference between the payments due bondholders before a loan is modified, and those due after modification. Why? Because the bondholders and the banks, the ultimate beneficiaries of homeowner payments, will be better off if mortgages are modified correctly and foreclosures stopped. The government “owes” them nothing more than that.