Here's an article from 2009, which has a helpful graph showing Obama’s projected deficits:
http://blog.heritage.org/2009/03/24/bush-deficit-vs-obama-deficit-in-pictures/
lets see...SS and Disab payments cost 800 billion a year...medicare and Medicaid another 800 billion a year...defense of the country another 800 billion...for a total if 2.4 trillion...total us govt budget for 2010 is 3.6 trillion...looks like we could easily cut a trillion without screwing all of those who have work their whole lives and paid all the SS and MED taxes...of course the first thing everyone wants to cut is the SS, Disab and MED