As the chief executive simply fire about 90% of every and all agencies. 100% of the people in supervisory positions. Once the cancer is cut out regrow each agency from the ground up under new internal regulation.
President Trump would need to find or build a huge warehouse someplace in Bum Fxxx, Nevada desert. Then the ones he can’t fire get a notice to transfer to their department’s station in that warehouse. Just a big space with lines on the floor dividing it into departments and a bunch of old GSA old wooden desks and oak chairs with no cushions and no swivels. No phones on the desk, just one phone hanging on the wall in each area. No cell phone service allowed or a signal blocker that will prevent cell phone use. And just let any one that decides to accept the transfer sit there all day, no productive work assignments. Have a time clock and if they don’t check in by 8:00AM they get fired and if they check out early they get fired and if they don’t use the time clock they get fired. Make the parking lot for the building a half mile from the building. Won’t take too long and they’ll quit.