One could hope that we aspire higher than killing people or allowing people to dies because they have no use to you. It's psychopathic and values people as nothing expect for their use to you, the same way a rapist doesn't give any value to their victims lives, just what they can get from them. Anyone suggesting that unemployed people don't get paid are on the same boat, because they do not value those lives at all, unless it gets them something.

Human history has always been dominated by scarcity. Fully automated production would by definition be a repudiation of all economic theories built upon a foundation of scarcity, so we can't really use them to guide us in devising a solution.

The closest humans have ever come is the indiginous potlach societies of Papua New Guinea where scarcity wasn't an issue and people lived fairly idle lives (and substituted physical scarcity with societal scarcity).