Spying is a mental disease
We've learned that at the NSA, mid-level managers would try to recruit lower level employees to report on conversations in the lunchroom, in order to glean intelligence of the order of office politics. A total Scanner Darkly situation, how sane people can go on year after year like that is something for the psychiatrists to figure out.
Read 'Harlot's Ghost' - at some point the CIA had become a completely dysfunctional agency trembling in a paranoid mental clusterfuck because there was a mole hiding under every desk.
Spycraft has its place, but when you've built up institutions with hundreds of thousands of spies, eventually the situation becomes quite absurd, and serves nobody.