“Dedicate agents”? Sorry, but if they are all willing to stand by and watch what little is left of the Bureau’s reputation and integrity destroyed by this corrupt bastard, they are every bit as slimy as he is.
It's highly unrealistic to expect such a thing to happen, and it wouldn't take long for the higher-ups to back-fill the vacancies with far less upstanding replacements. I'm sure there are honest people doing what little they can in their tiny areas of influence to minimize the corruption, which is better than abandoning their posts completely. Until the top is fumigated there won't be an appreciable change no matter what the peons do.