Every time you read someone bitching about capitalism, unless they are indoctrinated revolutionaries, the bitching is really about human tendencies.

Its the fundamental human tendency that rots every and all system, including "religion" or "charity". As the saying goes, we cannot design a civilization, the best we can hope for is to survive it.

Painting with the wide brush of "capitalism is bad" is an attitude more dangerous that capitalism itself. The reason being that its certain you have nothing better to replace it with, so the opportunists and the criminals going to hijack your half-baked ideology.