It seems likely to also organically change teachers' unions for the better, too. Unions filled with better and more motivated teachers will want policies that p

It seems likely to also organically change teachers' unions for the better, too. Unions filled with better and more motivated teachers will want policies that protect better and more motivated teachers. As it is now unions filled with bad teachers* will favor policies that protect bad teachers. Vicious cycle. * Not that most or even many teachers are bad, but the bad ones are probably the most afraid for their jobs, and therefore most active in union politics.