So Government takes a major stake in all these banks, then forces them to loan (since they are majority shareholders now) at super low rates like 2-3% interest for 30 year fixed mortgages. Real estate prices soar again. CDS's become worthless. Crisis over. CDS's are then made illegal shortly after and government raises interest rates and house prices fall again, but this time nobody walks away cause they got a 2% interest rate thats fixed so they have cheap monthly payments. Even if there are people that walk away, its no big deal as there are no CDS's anymore. Think thats it?