It is my understanding that to be hired by these agencies, polygraphs are part of the process as well as their contract. My advice for the next Trump administration is to execute that policy and polygraph every departmental leader and their second in command.
If they are lying, send them to Gitmo and charge them with treason. If they choose to resign instead, they lose their lifetime benefits and get only what they contributed into retirement accounts, minus the governments contribution. If they tell the truth, they either keep their positions, or in the case of second in command, get promoted.
My bet is the attrition rate will be very high.
Good idea, but sociopaths can pass lie detectors
My guess is that quite a few C I A are sociopaths.