Plus, how exactly will this magical government entity which is responsible for giving everyone their allowance not completely and utterly abuse its power and set society back until it gets toppled, akin to every communist regime ever? In fact, given this will be a world in which robots are advanced enough to substitute humans in every conceivable task, how will be this magical government populated by angels somehow not make full use of this new tech to completely solidify its hegemony over every aspect of everyone's lives? How would the people even stop it?
This is why I'm against the government providing basic income AT LEAST until tech advances to the point that resource scarcity becomes almost irrelevant, which is still a far future type thing (if a thing at all, as we have done a pretty great job of increasing our needs at the same rate we increase our capacity of acquiring resources).
I think the future should be more about empowering people as individuals, rather then creating a huge super daddy government that controls everything and gives people's allowances because their work doesn't matter anymore, because there's a pretty bad history behind those kind of attempts, because regardless of how tech changes, people are still people, and people have a tendency to fuck other people over if they gain too much power, either intentionally or unintentionally.
Money gives people a way of gathering power through their own efforts. People will have to remain productive and relevant in the grand scheme of things as individuals. The moment this gets thrown down in favor of some comfortable collective hugbox is when shit hits the fan.
You see, the moment people have tabletop machines capable of basically making anything to the point the market gets less relevant, it isn't communism, but something quite contrary to it. There's no ploretarian struggle because classes start to blend together and get more and more similar, and ploretarian struggle against a perceived elite has always been one of the cores of Marx's economical theories, so communism isn't the proper term for this at all. Classes will, of course, still exist, but the difference in each person's ability to achieve their wants and goals will be far increases and more leveled.
The government should remain as an entity capable of keeping shit from going out of the window, but less relevant and needed than it is today simply because its services will become less relevant at the point I have a star trek style replicator next to me and an AI to answer my inquiries.