Institutions protect themselves culturally. Bureaucracies have momentum. It's just the effect of self-interest and incentives (carrot and stick). If you really

Institutions protect themselves culturally. Bureaucracies have momentum. It's just the effect of self-interest and incentives (carrot and stick). If you really want to change something like the CIA, the government has to impose meaningful and powerful oversight. Legal avenues have to be opened up for confrontation and change to be possible. And of course to start it all off you usually need a true believer turned whistleblower. How else would the whistleblower have been shown all the damning evidence?