If you think teachers get paid a lot of money, you clearly don't belong in ATOT. We're all millionaires, after all.
$36k a year to start (typical) is below a lot of other fields with similar educational requirements. I finally got a "real" IT job (not helpdesk stuff) and make about double the average teacher starting pay in my state.
Meanwhile, tenure is harder to get than you think. Even if only because the job is harder than you think. Half of new teachers don't make it to the end of year 2.
And after that, what is tenure good for? Sure, there's always somebody dredging out the story about the guy who knew a guy who got paid to sit in a cubicle after he totally molested a kid (conveniently forgetting that if they could prove that, he'd be in jail) I worked in a public school district for six years as a help desk monkey and you know what? Teachers who fuck up get fired. Tenured teachers who fuck up get a chance to plead their case, and then get fired anyway. It's not a magic wand of job invulnerability.
You want a scam, follow the washed out teachers and find out what kinds of jobs they get. (Corporate training, charter schools, and educational software sales.)