Given the (often ongoing) educational requirements, if you pro-rate it you still come out much below most positions with similar requirements. We absolutely under-pay teachers in virtually every public school.

My mother retired after working her entire career as a teacher, and I earned close to double her final salary my first year working in tech. She has her masters degree and I did not graduate college. And if you count the stocks I got at the end of that first year, it was over triple.

She was a special ed. teacher teaching emotionally disabled grade schoolers (including a first grader that tried to kill his grandmother with a tv power cord). There is no way that I worked harder than she did.