I realize the point you're trying to make, Kimba. It is valid, but greed is not the end-all be all to evil, especially as it relates to what caused the housing bubble collapse. Greed contributed, but policy, pushed by the Government is what directly led to the bubble & its collapse.
One last time, if it not for the tactics and legislation pushed by the Fed, the lending institutions, would have continued to deny loans, of all kinds, including sub-prime, to those folks & families that were deemed financially unfavorable to repay on the loans. They still would have made their profits, they'd still have been making money, in whatever greedy fasion you may define as greedy, but there would have been no bubble nor burst.