In this context, universal basic income is just a nice way of saying government subsidies for owners of the robots (aka guys like Musk). UBI is completely unaffordable unless you kill most/all other government subsidies, and if you do that, it actually hurts the poor the most, those that take far more in benefits than they pay back. imo the more realistic doom and gloom scenario (assuming people can't simply find work in robotics and the world keeps moving forward) is that people basically have all the material goods they could want thanks to cheap, decentralized alternative energy and personal robots/servants, and demand for a corporation's goods are cut infinitely thin as worldwide competition brings the production of everything to its most inexpensive potential. As a result, most people sit around being degenerates and only a small minority continue to innovate out of personal motivation. But I don't think that scenario is particularly accurate either (and it's utopian in its own way as a kind of revival of the idyllic 19th century tinkerer/inventor occupation).