We spend a lot of time worrying about the kids who we give an inch and they take a mile, but to be brutally honest, I am far less concerned with these students than I am with those who are given a mile and take an inch.
Too often school is about complying to someone else's demands, completing someone else's chores, completing the teacher's homework assignment, fulfilling the curriculum's goals, and on and on.
Very early on we learn that school is really about doing as little as possible.
The 'just get it done' mentality drives far too many students to just go through the motions. So what does the system do?
It blames the kids.
Rewards and punishments embodied in things like grades creates an aversion to risk. All too often kids aren't lazy - they're being all too rational. They've learned to game the system in an even better way than the system has been gaming them.
In the end, we all suffer because too many kids grow up with the misguided impression that minimalism is as good at gaming real life as it was at gaming school.