There have been many on this board who have opined that Bush had a problem with having/leaving enemies within his administration. Where was the very clever and able Karl Rove? If Mr. Bush was too decent to remove all of his enemies from his own camp, where were his faithful advisors?
Carter was regarded as a decent man by people on both sides of the aisle. His "legacy" is none too admirable.
Flushing all the anti-Bush, anti-American career government employees would have been impossible until they showed themselves. By that time...as with Powell and Armitage...their damage was done. Look at all the judges and CIA people who have survived since the Carter administration.