If rank and file feds are being threatened, all it will take is one spark to set off an explosion. Most federal employees are good troupers. They want to do a good job, to be respected by their superiors, and to not make waves. Every new set of politicals has to win their trust.
In my own very informal soundings, I hear a lot of grumbling about the Obama politicals, and partisan politics aside (a majority of feds being dems), there is a significant subcurrent of "the Bush people were better." If the Obama folks are drawing blood, the permanent government knows how to fight back. The career staff knows where all the bodies are buried, and plenty of them know how to leak info.
Then why don't they? There has to be someone willing to spill the beans on Zero. Look at all the leaks that happen during a Repub administration. Are people leaking on Zero and the "media" are doing their best to hush it up by not reporting/investigating it? (Probably!) Whereas the "media" love to publish rumors and such as fact on Repub admins.
I hope they are protecting the witnesses who will break Benghazi wide open in a televised Congressional hearing (that the alphabet networks probably won't show live, or will cut away quickly if they do, and never report on it).