$ 1 Trillion can be saved by US government
Tightening the government spending by US can help in saving $ 950 Billion. But this would come at the cost of living standards of almost each and every citizen of America. Well, we are living in a period where debt is touching its raised ceiling after every few years, we might see many these government benefits being taken away from people of US.
Explanation on government spending on public and its comparison with the spending on Corporate can be found in this article A Trillion of revenue is on the plate