Long term, the U.S. economy has to be rebalanced. We have a decaying and declining manufacturing base; and before this financial crisis hit, some 18% of the U.S. GDP was in the financial sector, the highest percentage since the late 1920s.
IOW, we built too much of our economy atop these paper financial assets like derivatives and so on. And those just evaporated now.
I think we've learned the hard way that the U.S. cannot just be a purely service economy in which the biggest "industry" is financial speculation on Wall Street.