@Zahavasdad
I believe teachers should be well paid.
That said, one must realize that the union teacher in the public school district has a minimum of a bachelor’s degree, state certification, a teaching license, is required to attend professional development classes and in some states obtain a master’s degree within 5 years.
That Morah who is receiving a low wage may only have a Bais Yaakov education and a year in Israeli seminary.
This doesn’t mean she isn’t a good teacher, but we are not comparing the same job and requirement for employment.
When a cleaning lady who doesn’t speak much English gets $30/hour, that Morah should be paid at least $50.