The manager has to be in control. I don't mean to sound like a Theory X manager, but someone has to take the lead. In universities, nobody seems to be in control anymore. Richard Mahoney seconds that view. It's a disincentive to be productive.
Human beings are human beings.
Some are very fertile, and these faculty don't need tenure. But the deadwood should be gone. Suppose a new person comes in to remake a department, to upgrade it. Twenty percent of the members of the department are producing nothing. She has to wait for them to die.