The banks are completely culpable for the current cirsis as our the Government institutions that are supposed to police them.
They lent far too much money to people who couldn't afford to service that debt, they also lent on an variable asset which can fall in value, not just rise. They basically bet the farm on black and it came up red causing the current crisis.
Here are a couple of simple rules that would have ensured we never got into this problem in the first place.
1. People shouldn't have been allowed to borrow any more than 3.5 income.
2. People shouldn't have been allowed to release equity from their house.
The Government shouldn't have been allowed to peddle the lie that we had low interest rates, we've never been worse off as the amount we've had to borrow has never been so high!
Housing needs a big correction, the Government shouldn't prop up the inflated property prices.