This.
My wife probably works as many or more hours than anyone here. She ain't gettin rich. Teachers unions were started because the profession is regulated by local elected boards. Without some kind of protection every time there's a new election somebody gets replaced by somebody elses daughter.
Are there bad teachers out there? Of course. But there's bad mechanics, doctors, lawyers, whatever.
And don't forget. Teachers are told what to teach and pretty much how to teach it. It's called a curriculum. The curriculum is usually picked by the administrators and school board. Their method of choosing publishers appears to be based on whoever buys the most drinks or pehaps offers the best kickback.
Can somebody tell me why all of a sudden we seem to hate our public employees? Don't forget, in most cases they forego higher salaries in exchange for health and retirement benefits.