You don't take peoples social security away. You still pay them while stop collecting for social security and then you stop owing people social security. Furthermore you offer a refund to those who have paid in but not reached SS age.
Social Security is worse then private investing for everybody... except those who can't afford to save... in which case they could use the money anyway... as many of them don't end up qualifing for social security and are much more likely to die before collecting it.
State department could likely take a huge cut.
Department of Defense could be cut as well by getting rid of useless bases in places like Europe.
Medicare as already stated could be changed so people don't benefit from illegally sneaking in the country and having kids. (Really being born in the country making you a citizen should be gotten rid of in general anyway.)
The "global war on terror" is pretty pointless, probably could cut most of that depending on what that entails.
The Deparment of Education... can be completly eliminated probably need to keep some of it's spending but just get rid of the whole department. Delegate education to the states. Competing agaisnt each other to have the best schools, education and smartest population for economic advantages is enough motivation. the DoE hinders education more then it helps it as far as i can see.
Discesinary spending... likely could be cut quite a bit.
Housing and Urban development could likey accomplish more for less by liscensing out more.
Department of Agricutlute.... farm subsidies actually hurt the US economy if it's covered here... and all should be gotten rid of. It's basically us paying for our food to cost more... for the benefit of factor farms.
