Has Anyone Been Held Accountable for the Subprime Mortgage Crisis?

In case we have forgotten about the Subprime Mortgage Crisis, Frontline replayed their documentary "Is Wall Street Untouchable?" tonight -- see the video above. It has now been almost five years since the start of the financial crisis in 2007 and the statue of limitations on civil fraud cases is about to run out. It appears right now that there will be no major Wall Street prosecutions, either criminal or civil.

Can anyone see a link between the lack of prosecutions and the obscene level of income inequality in the US?