Hell yeah.
Which is why I'm quitting my tuition assignment.
No amount of money is worth the effort of teaching that playful kid
who can still fool around the night before his exams. 
Besides, I'm already teaching my two younger cousins who are a lot
more diligent and hardworking. My aunt was pleased at their results
and gave me a bonus - but I pointed out to her that they did well
as they had the right kind of attitude towards work. Such students
are a joy to teach; I gladly obliged when my aunt insisted that I
continue being their tutor.
Can't say about this other tuition kid of mine, though. If
anything, I get more stressed than he does over his work. Somehow
he doesn't realise just how bad it is to waste his parents'
hard-earned money and how screwed-up his future can be if he
doesn't work hard now.
No point fussing over those grown-up kids of yours, rainee -
they're just screwing themselves of their money. If they can't see
the light, then let them get blinded by it by themselves.