We've never tried socialism where all the workers are replaced by automation. I suppose it could work, but I'm doubtful. People just aren't meant to live that way.
people aren't "meant to" live in cities, use wheel, spend life in front of computer screens... but we're not hunters-gatherers any more, which suggests that what we are is far more determined by current form of society than innate "human nature". living a TaskRabbit life in the techno-capitalist dystopia is no more "natural" than some hypothetical form of democratic socialism - not to mention far less desirable for the majority.