Levy a $24,000, one-time tax, payable in installments over 10 years, against anyone who took out an interest-only mortgage (or various other high-risk instruments) during the previous 10 years, using the full nasty power of the IRS to collect (garnishing wages, etc.)
Take the proceeds and give it to homeowners who did NOT engage in high-risk activities as a tax refund.
Since taxpayers will be bailing out wall street anyway, why not move the blame closer to where it belongs? -m