Martin Fedstein has a new idea for solution to the mortgage and credit crisis. He has a Loan Substitution Program and this is how it works. The Government would loan mortgage holders 20% of their current mortgage loan, with a 15 year payback period, and an adjustable interest rate based on what the government pays on two-year Treasury debt (now just 1.6%).The loan proceeds would go to immediately reduce the borrower's primary mortgage, cutting interest and principal payments by 20%. Participation in the program would be voluntaryand participants could prepay the government loan at any time. The basic idea is to lower the Loan to Value Ratios and help prevent foreclosures and defaults so that house prices which may have another 10-15% to fall, do not fall steeply and overshoot as millions of foreclosures take place across the country in coming months. Legislation would require that the government must be repaid before all creditors except the mortgage lenders, and that the debt to the government would have to be paid, even if the homeowner defaults on a mortgage. The critical thing this would accomplish is that homeowners would pay less in total interest. In exchange for that reduction in that interest, they would decrease the amount of the debt they can escape by defaulting on their mortgage....