The bankers and financial institutions have the bulk of the blame to be sure. After all, they lent money to any one who could fog a mirror. However, lets not forget the the blame that goes to the masses that bought into the ridiculous notion that one could buy a home that one really couldn't afford, but believed would simply increase in value into perpetuity, thereby making it a good investment. There was regulation. It was called the Glass Steagall Act, and worked fine for over 50 years until Clinton repealed it. (it was passed by overwhelming by partisan vote in the house, far exceeding the necessary 2/3 vote to override a presidential veto, if indeed there was to be one. However, Clinton wanted the credit for passing it... so now he gets it.) The teachers are not to blame, but their unions negotiated with politicians that they had in their back pocket to get sweetheart deals that the tax payer can not afford to keep.