I think the issue Marx points out isn't an "original" quality of capitalism, but rather an "eventual" (steady-state) quality of it. AFAIK, capitalism is the id

I think the issue Marx points out isn't an "original" quality of capitalism, but rather an "eventual" (steady-state) quality of it. AFAIK, capitalism is the idea of investment of capital. Marx's issue is that the capital pools in such a way that most people don't have it, or don't get to spend what they do have in a way that gets returns. In an ideal situation, I am able to "spend" my "excess capital" - my excess time, skills, drives, etc - to improve my own situation. This is personal. However, in practice, many people can't or don't do this. Maybe they're missing that drive towards self-investment. Maybe they're minimum wage and literally don't have any excess. Marx's issue of "praxis" - that you do not own (literally or emotionally) the product of your work is an emergent, rather than inherent, quality of capitalism. So it seems reasonable that a society could exist with other factors the confound that emergent quality, so that you can have you cake (the core bits of capitalism) and everyone gets to eat it (everyone can actually take advantage of those core bits)