"This also explains why rewarding success may be more useful than punishing it in the long run: if a kid does his homework because otherwise he doesn't get dessert, it's labor. If he gets some reward for getting it done, it becomes a positive."

Shouldn't we expect loss aversion to partially or completely counteract this, and doesn't receiving a reward for something qualify as labor too?

(Side note: This reads as 'rewarding success is better than punishing success.')