This last is important. Even in corporate environments, it is very difficult to remove an underling for incompetence if that underling has seniority and a long history of good performance reviews. As in government bureaucracies, the easiest way to deal with such people is often to "kick them upstairs": promote them to a higher post, where they become somebody else's problem.
( David Graeber )
[ Bullshit Jobs: A Theory ]
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