One thing we actually agree on! I don't want us being the police force of the world, that is what the UN is for. The country is in such poor shape right now that we should stop foreign wars and activities besides having some bases around mainly for PR reasons. One thing to remember is that the figures you see spent on wars are inflated because a large chunk of those costs would still be there if we weren't at war. You still need the military and they would be training costs incurred anyway.
This site is pretty eye opening
http://usdebt.kleptocracy.us/
I also think all foreign aid should be stopped. Granted it has been cut a fair amount, but it is still ~$45 Billion dollars that are being given away each year.