I can think of a few things, but they will never happen.
1. Close Washington, D.C. I mean, SHUT IT DOWN, at least the federal government.
2. Move the federal government to Dubuque, Iowa. (There isn't room in Dubuque for the massive size of the government, but that's too bad. Put up tents if you need to. Use the high school football field, because they're not doing well with it anyway.) DoD will have to set up shop on a barge on the Mississippi River. (No life jackets -- if you can't swim, too bad. Take a chance.)
3. Congress gets only the benefits that the US Constitution provides. Only half of their current salary. Lobbyists are prohibited from interacting with any government official, employee, or skateboard maker. Violators will be imprisoned for not less than 10 years on another barge parked on the Mississippi. No shelter. Suck it up, cupcakes.
4. The president gets that old Motel 6 on the edge of town. There's no kitchen, so the WH chef and his entourage are fired. The president and his family can get their meals out of the vending machines in the hallway.
5. The House of Representatives gets the old Elks Club hall on Main Street. Just down from there there's the old Lion's Club for the Senate. (The Lion's Club is smaller, so suck it up, senators.)
6. The president's cabinet is cut down to only what is specifically within the U.S. Constitution. Jimmy Carter's Secretary of Education is history, as are the Secretaries of Energy, Homeland Security (we're not securing our homeland as it is), Labor, Transportation (don't let the door hit you in your well-used ass, Petey-boy, on your way out), the DNI, and all those dumbasses that clog up so much of the West Wing and the Old Executive Office Building. All of them, gone. The VP uses the cells in the town jail that aren't being used.
In short, it's time to tear it all down and start over.