A friend of mine once told me many decades ago that, in America today if you start a flower-sniffing club with more than three members one of them is an FBI informant.
More than ten members, once of them is an FBI agent.
More than one hundred, the FBI is actually running the organization from leadership positions.
I can remember laughing at this idea. THEN.
More than ten members and half of them are either FBI agents or informants.
Your friend was correct—then and now:
https://en.wikipedia.org/wiki/COINTELPRO
After the Church Committee exposed them they hired a bunch of lawyers to convince everybody they were now good boys and girls—and created layers of special access programs outsourced to other agencies and/or contractors and/or foreign allies out of the reach of the lawyers—or FOIA—or Congress—or anybody else that might get in the way.