[bd_at_rivenhill]

The most important thing for day-to-day economic health is to make sure no one loses retail deposits

You're ignoring the money market here. I just looked up some numbers, and Forrester research peged the amount of deposits at FDIC insured banks at $6.9 trillion at the end of 2007 (http://www.forrester.com/rb/Research/industry_essential_us_r..., although the number of insured dollars is probably a fair bit lower than that due to limits on the size of insurable deposits), while the Institutional Money Market Funds Association gives $3.6 trillion in money market funds. Money market funds are marketed as being equivalent to bank deposits (down to the ability to write checks against them) and many retail investors don't understand that they aren't insured.