This is the best reply so far. In the US, things (good and bad) vary dramatically between school districts, but everyone talks about “teachers” as this monolithic group.

In the Boston area it’s absolutely possible to exceed $100,000 salary. The pay scales are public, look it up yourself. I’m willing to believe many teachers are underpaid, and that those in Boston have legitimate gripes too, but we need to be clear about which context we’re discussing.