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Penny Arcade sums up the Unity debacle in the first panel.
(www.penny-arcade.com)
Today's Penny Arcade is a near perfect commentary on the Unity debacle.
Whole comic linked above, but here's the one-panel that is perfect.
Supernatural did it in their season 7 arc.
Charmed did the reverse in that Hell is basically a bureaucracy.
Angel kinda did it in most seasons, but with a more "demonic law firm" angle.
I don't remember much of angel but in supernatural it's eldritch creatures posing as billionaires to control and dumb down humanity to use them as a perpetual food source. Actually pretty deep and prescient for an older show.