We're lucky enough to live in a society that's (more or less) set up so that people are rewarded proportionally to how much they can contribute to everyone else. Of course it's not perfect, and of course there are assholes and corruption, but in context of history, it's the best deal we've ever had, IMO.
No, we shouldn't put down people who aren't very smart. We should help them. But I think we need to take a step back before we start saying that the (rough) meritocracy we have set up is some kind of dystopia. Can anyone actually provide a better alternative?