The reason is very simple. When I worked for a government funded outfit, I was never going to jeopardize the amazing pay and benefits by rattling the cage. 99% of FBI agents probably in the same boat. Don’t want to give up the amazing income.
About 15 years ago. A family member of mine that was a deputy US Marshal had one beer to many at our cookout.
He looked at me and said, He really didn’t trust the people he worked for.