> A "job" is not a spontaneous effect of a desire, its not a natural thing, but simply a formalization step in capitalism for the sake of exchanging labor for pay.

In any system including moderate technological complexity (e.g. roads, sewage disposal systems) there will be tasks that are useful, or even necessary, for a community but that nevertheless have low intrinsic rewards. Providing extrinsic rewards (e.g. money) in exchange for doing these tasks has nothing to do with capitalism.

What may have something to do with capitalism is whether or not people need to exchange their labor for goods or money in order to remain alive. In a system where this is no longer necessary, finding the right kinds of rewards and/or motivational culture to get people to do unpleasant tasks that still need to be done will be a challenge, I suspect.