Okay here's what (should have) happened in 2008. (a rough breakdown)
Housing prices were inflated up to a point, the bubble popped, and suddenly people were in mortgage situations that were way over their heads. Now, in a free market, the companies that made bad lending decisions would have been forced to declare bankruptcy, leaving the next-in-line competitors to come in and buy up toxic assets at reduced rates. Liquidation, in other words. It would have worked somewhat like an auction where people buy stuff cheap and hope to re-sell the goods for a profit, just not for as much as the goods had gone for before. --- so yeah, liquidation.
For the homeowner and the new 'top dog' company, they *might* have been able to re-negotiate previously inflated mortgages to a more acceptable level. This would have been a win-win for everyone. The home buyer gets to stay in his home with a mortgage he can afford payments on. The new mortgage holder gets to make a profit off of assets that were bought relatively dirt-cheap from a now-bankrupt AIG. Everyone lived happily ever after. The end.
What actually happened?
Government stepped in and bought toxic assets off of AIG's hands (and numerous others). For the company on Wall Street, this meant they got off the hook. But the homeowner? [okay he's not actually an owner until the mortgage is paid off, but let's not get too technical] His home value just got shored up by a government bailout! With no relief and still in over his head, he's faced with foreclosure. And forclose they did.
The panic was all over housing prices falling when the market was indicating that prices needed to fall. Now, if you're an investor in real estate, falling prices is a bad thing. But if you're a homeowner who is simply looking at either keeping a roof over his head or getting tossed into the street, cheaper house-payments aren't exactly a bad thing. Sure, you aren't going to 'flip' the house and move out and turn a profit (like we thought was just going to go on and on forever indefinitely), but, yeah, at least you have a roof over your head.
Want a summary in the form of a cheesy football analogy?
AIG is still in the game after the referee (the market) tried to throw them out. The homeowner is still trying to figure out if he should stay for the rest of the game or leave the stadium now and try to beat traffic. And the Fed is still coaching every team making sure no one makes any plays that aren't planned in advance. Not much of a game if you already know who's gonna win, is it?