Students who acquire large debts putting themselves through school are unlikely to think about changing society. When you trap people in a system of debt, they can't afford the time to think.
Education is a system of imposed ignorance.
The truth of the matter is that about 99 percent of teaching is making the students feel interestedin the material. Then the other 1 percent has to do with your methods. And that's not just true of languages. It's true of every subject.