Much too much is being made of this one announcement. This, in itself, is not near enough to fix everything that went wrong. And neither Volcker or Bernanke have the ability to look at how economic theory plays out in the real world. You've got to go to Elizabeth Warren for that.
"For instance, while Mr. Volcker supported 80 percent of the administration’s detailed plan for financial regulation, he opposed maintaining the investment side of banking, as well as the weakening of the Fed. He said that the government should give the Fed responsibility to survey the whole financial system as well as the ability to intercede in any sector when there is a dangerously large amount of trades in that area. He also believes the government should have the ability to intercede any time a particular institution has become too risky. “Somebody should have raised the question that subprime or credit default swaps raised a threat to the markets,” Volcker said.
Fed Chairman Bernanke, on the other hand, took the opposite approach, saying "plenty of firms got into trouble making regular commercial loans, and plenty of firms got into trouble in market-making activities,” at the Economic Club of New York on Nov. 16. “The separation of those two things per se would not necessarily lead to stability.”
The Senate released their version of a reform bill that would create a single federal bank regulator (opposed by Volcker) leaving the Fed only in charge of monetary policy. This approach is supported by supported by Arthur Levitt, a Clinton-era Securities and Exchange Commission chairman. The Senate bill also tightens capital and leverage requirements, provides shareholder with no-binding votes on pay and board; closes loopholes on derivatives, securities, hedge funds, payday lenders and more.
In Dec, the House passed a reform bill similar to the Senate bill except it does not create a single regulator, and also creates a federal insurance regulator, directly regulates derivatives and hedge funds, reforms credit ratings agencies, and creates a dissolution authority to dismantle failing institutes."
http://obama-mamas.com/blog/?p=1078