Americans blame the federal government more for the nation's economic plight than they do the primary target of the Occupy Wall Street protests --- big financial institutions. If you don't know why people are protesting on wall street, this article gives a very good explanation on it.
If you US didn't spend all their money on the war, they wouldn't have to raise the debt ceiling. They either have to raise the debt ceiling or cut spending costs or China might take over. If you don't know what the US debt ceiling is, this article gives an awesome explanation on it.