Cut everything to 1946 levels. The levels where we had just finished a war. The levels before the cold war started. Well, with some inflation.
Everything. Parks. Social Security. Military.
Or: we could cut everything but the bare nececities of a nation. That being a military, and transportation networks. Everything else is secondary. FBI, CIA, NSA, etc.
The primary purpose of any government is to protect its citizens from physical harm. Such as an invasion. Nothing else is more important; if its citizens are dead, then there is no nation.
