What Herr Bernanke is missing is that "crashes" are deflationary and preserve the value of the currency...
Printing money to stop a crash is inflationary...and destroys the value of the currency...
What they haven't figured out yet on Wall Street and in Washington is that you can't have constant booms and bubbles just to satisfy your political and economic base...!
It's just not possible...although the US economy has been lucky so far with it's Bubblemanias...
That luck is going to run out... and sooner than many think...