“Congress passed laws giving these employees all kinds of protections.” You can move their offices to remote and unappealing locations, Try places like Minot, ND or Jackman, Maine.
Likely the residents of Minot and Jackman would be quite angry that you would even suggest such a thing.
But Trump’s people were pushing hard to move federal employees out of the DC area.
The USDA was to be moved to Kansas City. The Bureau of Land Management was to be moved to Denver and spread out in many BLM offices.
An internet search using terms “Trump moving OPM out of DC” lists dozens of reports of fights of the Trump presidency with the federal bureaucracy.
The Fed’s today really are insubordinate to any outsiders thinking to change their “good thing”.