The culture doesn't allow it. If you don't publish enough, in prestigious enough journals, instead of tenure you get replaced. That's one reason this is a pretty interesting move - by providing an alternative publishing location based on principles that the universities supposedly value, this sort of departure _could_ help push the academic culture toward a less-abusive publishing model. Institutional change is hard.
I keep trying to organize my academic friends to join unions and engage in organizational sabotage of administrators, who have completely taken over the academy and left most faculty in a state of abject misery. Huge endowments seem like part of the problem, universities are essentially run as financial concerns with a vestigial teaching staff attached that many regents would rather do away with completely.
True, but in the meantime faculty need to find ways around the power of the administrators rather than waiting for fairy godparents to intervene, especially given that administrators control all the budgets and have entire departments devoted to flattering donors.
