If so, maybe you’ve hit on a kernel of truth: we can’t risk paying teachers enough that they’d have the financial security to leave a bad work situation.
Also investment bankers have as much autonomy as a client allows them to. And MDs and VPs are as much responsible for their subordinates and client relationships (although not in the same way as teachers are for students).
I had several high-school teachers who weren't financially comfortable, yet still chose to spend hundreds or even thousands on their students during a school year.
Of course, those teachers would have been much more effective if they were in a financially stable position. I also would have had fewer quality teachers leave.