Try to bring issues to the public and they'll charge you with "espionage"/"mishandling classified information"/etc. Even if the charges don't succeed, you'll lose your career and the court case will ruin you.
Also, read Ronan Farrow's piece from the New Yorker last week. They targeted a straight-laced DOJ lawyer with >20 years of experience. These organizations are out of control and pose a very serious threat to our freedom.
https://en.wikipedia.org/wiki/Russ_Tice
https://www.newyorker.com/magazine/2020/11/09/how-a-cia-cove...
And that is why those senior public servants with power in security agencies hate wikileaks and are willing to trash the constitutional protections for journalists to get Assange and also want to destroy Snowden so very badly.