Adler was very critical of education by reward and punishment. It leads to mistaken lifestyles in which people think, If no one is going to praise me, I won’t take appropriate action and If no one is going to punish me, I’ll engage in inappropriate actions, too. You already have the goal of wanting to be praised when you start picking up litter. And if you aren’t praised by anyone, you’ll either be indignant, or decide that you’ll never do such a thing again. Clearly, there’s something wrong with this situation.