I don't regard that as obvious. A social safety net COULD catch them when they fall out of the workforce. We don't seem to have such a safety net in America, but that's a consequence of politics, not of economics or technology. Confronting those politics admittedly is a tall order, but consider the alternative: retarding innovation, wasting human potential, and maintaining make-work jobs because politics is hard? Is that really the hill you wanna die on?
You make it sound like there are only two choices:
1. Confronting the politics of building a social saftey net in America.
2. Retarding innovation, wasting human potential, etc. etc.
Yet there is a perfectly good third solution that has worked countless times in history when technology has made certain jobs redundant, and will without a doubt continue to work long into the future.
You made it sound like there's only one choice when you wrote above:
> Eventually, you simply have to go to work for a roof over your head, food and healthcare.
I'm glad we finally agree that there are at least three choices, that building a safety net is one of them, and that going to work so that you have a roof, food, and healthcare isn't the only one.