I'm surprised you'd ask, given that it was explained over here, a thread you're posting in-
http://forums.anandtech.com/showthread.php?t=2183533&page=12
The S&P downgrade was a symbolic act- meaningless against the backdrop of the economy & the market. We're entering a liquidity trap, and a debt/deflation spiral.
The known ways to escape that are over time, lots of time with lots of economic pain, or with
income redistribution to create jobs, as was done in the 1930's.
Things will get worse before they get better, simply because the interests of wealth are being protected above all other considerations. I doubt that will change, unless things get really, really terrible, at which point public denial will collapse.