True. Customs collects duties. But other then that, all we need is a couple of guys in an office who send 50 bills out: Let the States collect their dues for keeping the FedGov operating, and send them in annually.
Other then that, no need for a giant bureaucracy.
That's what the Founders planned. They had it right.
That would be great. As sovereign entities, the states could then decide on a year-by-year basis how much they should send in and how much they would withhold. Some states will simply decide they can use the money better back at home.