Some people are drawn to power because it appeals to the negative/dark side of their personality and they aren't even consciously aware of it. And once in the position of power; wield that power according to those negative/dark traits. The practical outcome of that is behaviour such as this. And the more senior they become; the less feedback they get and the less able they are to even listen to it if is ever given to them.
And if you're a skipper; imagine how they are to FOs, cadets, trainees and cabin crew...
More info on the Dark Tetrad of personality traits: