Yes.
I wanted Trump to walk a few blocks down Pennsylvania Ave one day to have lunch at his hotel. From there, the IRS, FBI, and Justice Department are nearby. He could walk in to each one, go to the top 100 managers’ offices and issue old-fashioned pink slips. Everyone else would have to reapply for their jobs and be screened as if a new employee.
Only two appointees I believe at IRS, commissioner and chief counsel.