Trump has talked about it. The federal government is the universe's largest monopoly, and the 600,000 or so denizens of its headquarters, Washington, D.C. -- a city the size of Mission Viejo, California -- purport to manage a nation of 333,000,000 people.
Start fixing it by eliminating all federal agencies created during the late-'60s and early '70s mainly to placate rioting hippies. That ship sailed long ago.
Then, after more pruning, quarter the remaining agencies in logical locations. Move Commerce to New York, Interior to Denver, Agriculture to Omaha, Energy to Dallas, etc. Enrich the economies of those cities and states nearest to their function, instead of trying to "govern" them at massive expense from hundreds and thousands of miles away.
You forgot Department of Education which should cease to exist, but if it stays….Fairbanks, Alaska?