I can't conceive of a way government can "fix" this mess. To be fair, it was brought on by liberal policies, but real estate agent collusion, greedy homebuyers who lied on their apps, predatory lending practices and mortgage brokers who also promulgated the lies bought all this on. So a fix wouldn't be fair to those who played properly within the rules. Also, since prices were pushed artificially high, this is a proper adjustment for prices.
I think if I would offer help to people, it would be the following:
1) Forgiveness of loan balances for those who chose foreclosure or a short sale so long as they meet certain financial conditions.
2) If #1 is met, then they have no tax liability for short sales.
3) Identify those areas where real estate agents illegally drove prices higher or predatory lending practices were strong... and force those industries to shoulder some of the financial burden for allowing people duped by their negligence.
4) Relax bankruptcy rules for people grossly upside down in mortgages where it was the price of the house and not piling on personal debtto a housing loan.