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https://en.wikipedia.org/wiki/Smedley_Butler
In 1933, Butler claimed to have been approached to become involved in a controversy, the Business Plot, telling a United States congressional committee a group of wealthy American industrialists were planning a coup d'état to overthrow President Franklin D. Roosevelt. Butler also claimed the plotters of the alleged coup intended to use him, at the head of a group of veterans, to place the federal government under arrest. The individuals alleged to be involved in the coup all denied the existence of such a plot and the media ridiculed Butler's allegations, but a final report following an investigation by a special House of Representatives committee confirmed at least some of his testimony.
Eisenhower specifically called out the military-industrial complex in his final speech as president.
No one listened to him either (well, they might have used his warning as a road map) and meow the country, and perhaps the world, are in a very dark place.
Twenty years ago, when I was in high school, was the first time I listened to Ike's military industrial complex speech. I was a smart kid but the speech didn't have the weight it has now, in my adult life.
I think about that a lot. Same with the Robert Mueller warning. It's almost like, in both instances, these men felt they had no power to do anything beyond some ominous warnings. And unfortunately, like when I was a teenager, I feel it goes over most people and they are indifferent.