Sorry if it's in the wrong spot (it was this or editors), but I know someone who works in the K-12 academic field (I'll call this person J for reference).
The "higher ups" are like a teacher's union, and the lower ones like people who aren't in the union. How is this so?
My friend J says at the high school in their district, it was known that one of the band teachers wasn't the best in behavior and temper. He would throw chairs, have fits, and it finally took him reportedly hitting a student to remove him. There's bad teachers that have "tenure" that don't know what they're doing, but because of the union, they can't be removed without them doing something illegal.
Obviously, this can be paralleled with WP. The abusive admins keep on being abusive until the community gets too fed up with them and asks for their removal, even then it's hard, usually these are in the same group as we all know and love. But you take an admin who tries to stop them because they believe what's going is wrong, and they get booted.
Just two cents worth of thoughts.