Did Congress never ask Greenspan about his opinion?

Sir with reference to your editorial “Saying sorry” October 25, if anyone had answered “I presume that the self-interest of organizations, specifically banks and others, is such that they are capable of protecting their own shareholders” we would never ever dream of appointing said person to anything that has to do with banking regulations. Since this is what Alan Greenspan now tells us he always believed does that imply that, in their confirmation hearings, the US Congress never asked him about his views? Can Bernanke be hurriedly recalled to Congress for a brief follow-up question?

The saddest part of the story though is that had only Alan Greenspan regulated according to his beliefs, he would never ever have imposed upon the banks the opinions of some few credit rating agencies, and these agencies would therefore never ever have been officially empowered as the supreme risk guides, and therefore they would never ever have been so much enabled to have so much of the market follow them over the subprime precipice.