From one not familiar with 'how things work' in Washington.
Say you identify the 'bad guys'. In an environment of civil servants and Federal Workers Unions; how do you "clean house"?
It's always extremely difficult to fire them, and even impossible in a lot of cases.
The best you can do most of the time is make their lives miserable at work. Give them the crap assignments, that sort of thing. Some people will take the hint after a while, but even then, some of the goldbrickers will just continue to ride it out to retirement.