[Natsu]

The problem with capitalism is that it gives people what it wants, and some people want bad things, or are at least indifferent to getting what they want despite bad externalities.

The hard part is that I'm not sure any other system really fixes this flaw. Sure, you can be less democratic and give fewer people what they want, but for some reason few people want to live in autocracies of any stripe.

And it's not always clear that there is a solution when the things people want are too diametrically opposed, either. I'm not sure many people would be happy with any of the solutions from "Three Worlds Collide" for example (a short story you can go read online if you don't get the reference).