Simon Funk [1] makes a great point that in a mixed capitalist/welfare state, automation decreases efficiency. Imagine a worker, earning the bare minimum to survive, who gets replaced by a robot with slightly lower operating cost. Now the robot is consuming slightly fewer resources that the worker would have, but the worker doesn't stop consuming resources in turn! Unless you're willing to kill the worker, he goes on…
Or to be less flippant, this kind of reasoning only makes sense if you assume that the split of revenues between the state, the worker, and the employer overwhelmingly favors the worker and the state. That doesn't seem like a situation in which the employer chooses to hire someone at all, actually, so I'd consider it somewhat unlikely.