Easy.
People who would have normally qualified for a normal house loan got bumped down to the subprime loans - which meant more money in interest payments to lenders. Hmm, what led to that decision? GREED. Now that's not to say that there weren't a bunch of fucking idiots taking loans they shouldn't have, but there was also a lot of people who should have been given a better deal had it not been for the greedy lenders trying to earn an extra buck by forcing them into a subprime loan.
Look at where the financial windfall these bad loans have taken us. Look at the billions of dollars in write downs the largest financial institutions have made. We lost Bear Stearns, almost lost Countrywide, and if things don't improve dramatically, Citi Group could be the next big institution to take a shit.
I'm more interested in learning why you don't think this wasn't caused by greed, but that's for another thread. I'm bitching about oil companies hrrr.

