I am saying we have been on a credit economy since WWII. Credit economies are inherently unstable. That is why our economy is in constant need of adjustments and fixes. Additionally, credit economies cannot be indefinitely sustained. The minute people start saving (ie: paying down their debt) it slows the economy, and we face recession. So the government moves to open more credit through lowered interest rates, CRA and similar acts. So people start borrowing again (and not just for housing, it's simply the biggest market and therefore the first to collapse) and as a result of increased spending (via credit) the economy picks up again.
When the credit market reaches saturation, those who did not spend themselves into bankruptcy again turn to focus on paying down their debt. The economy slows, and we face recession again. So high risk lending is further encouraged through reduction of regulations. Spending increases - again through credit - and the economy picks up one more time.
And so it goes. But we have reached the point of diminished returns. The economy simply cannot support the debt built up. The economy slowed and as a result earnings dropped off. People have more and more trouble meeting their debt obligations, and now the whole structure is on the verge of collapse.
The credit economy is the cracked, unstable foundation. The banking crisis is the sagging wall threatening to collapse. The bail out is the shoring timbers used to support the collapsing wall. But the credit economy is still a cracked foundation. And as long as the foundation is cracked, no amount of shoring is going to keep that wall (ie: the lending market) in place - it WILL subside, and the roof (ie: the rest of the economy) will come down with it.