Start with a recently created Department - such as Energy, Education, or EPA - the 3 Big Bad E's. As an Executive Decision, and AFTER you have worked out the main details (don't sweat the small stuff, just have an overall plan), announce that the department will be eliminated as a separate entity, and either folded into another department (such as Interior), or eliminated entirely.
Get the states on board by offering to give 2 or 3-year block grants to the states to TEMPORARILY replace part of the federal money that will be, shortly, no longer available. Have a sunset date built into this Executive Order. Right away, the states can save money by eliminating their staff that is responsible for applying for, and administering, the Dept. grants. That, in most cases, is a LOT of people.
- Fold essential functions (and, they are not many) into the Interior Dept. Eliminate the duplicate jobs/categories/administrative people no longer needed.
- Interior will announce that these new jobs will be located in one of the midwestern states with substantial energy production. Right there, you move a LOT of people out of the Washington orbit. The lure is that their salaries will stretch further. Only the Director of the Energy Division will be located in Washington. Everyone else stays in that new location - including ALL upper-level management staff. That removes a lot of people that will no longer be available to be wooed by lobbyists.
- Announce that all Federal employees may apply for the positions that will remain, on a competitive basis. NO guarantees for ANYONE.
- Many of these jobs will be contract-only, and the contracting companies will take former skills and experience in the previous job into consideration (also, special consideration for vets). If the employee doesn't perform to expectations, their supervisor puts in a request to his boss that the contract employee be removed. As they have no job protections, this should be easy. Ideally, the rest of the staff will get the message, and step up their work ethic.
- For those people who have been doing their job, without acting as a Deep State ally, the executive staff should call in markers to their contacts in industry, and help them find new work - NOT in government, unless it's at the state level.