Medicare, medicaid, social security, all farm subsidies, DHS, IRS, congressional perks (like 200,000 plus for food for Ms. Pelosi and staff to eat on the way to and from CA -- and the planes as well, when it comes to that -- if she wants to commute weekly, do it on her dime). Reduce all the staff for house and senate to 1 per member paid by taxes.
Funding for the arts, NCLB, prescription drug program, the entire defense department (unless the constitution is amended), etc.
Basically, go back to the CONSTITUTION and follow it. If you want something changed, like a military, then put it to a vote of the people in the states.
I am sure I could find a lot more, once we get rid of all of these.
Oops, almost forgot... the war on drugs. The war on poverty.