If teacher salaries were $120k and up I bet you'd get a whole new class of teachers.
Especially if they possess the skills/drive to switch to other more lucrative occupations.
Don't get me wrong though I think that teachers should be well paid, more than enough to live comfortably and happily so they can enjoy what should be a very fulfilling job for them.
At least teachers are only in control of one class room. The most mischief they can do is to buy animatronic dinosaurs for the one lesson where they mention prehistory to kindergartners.