Comment by zie

Sadly bad actors still exist everywhere, we haven't managed as a society/culture/race(as in the human race) figure out how to eradicate bad actors yet.

That said most public schools now are required by law to have a bunch of checks and balances and it's probably fairly rare that teachers are allowed to directly handle money much anymore. In my schools every employee has to go through a training every year about how the district handle's money, and your role in it (as a teacher/employee/etc) so it's at least now very clear what you are allowed and not allowed to do.