The following Departments must be eliminated: Agriculture, Labor, HUD, Energy, Education, Veterans Affairs (goes back to Defense), Homeland Security.
The Commerce Department will be reduced to the Post Office, wieghts and measures, patents and copyrights, and interstate commerce (all per the Constitution).
Health and Human Performance will be just Health and will consist of the Food & Drug Administration and the Centers for Disease Control.
All federal land not used for military purposes will either be sold to the private sector (cash to pay debts) or turned over to the states. National Parks will become state property.
You could eliminate everything except for Medicare, Medicaid, Social Security and Unemployment (there may be one other entitlement, memory’s a bit weak this morning) and the Federal Government would still run a deficit.
Those programs consume ALL federal revenue and then some.
Everything else the Federal government does is done on borrowed money.