India floats the idea of a universal basic income

Yes there is a pretty big difference. Its not wealth redistribution. You are just spending the money created by natural resource. Its Govt/Peoples wealth to spend as they see fit.

If (a) is true, people will still work (because they want money above their UBI), and will still create progress (i.e. little will change). I'm not sure how (b) connects. Perhaps it assumes people will do less work towards automation under UBI?

I would like to think people will still work on UBI. In fact, I wouldn't be surprised if the percentage that don't is similar in some respects to drug use in those places where all drugs have be decriminalized (and perhaps similar to true unemployment numbers now). There is a question of what people will do with their freedom to choose what they will do. Would we get more and more creative art? More inventions and entrepreneurs? More things that are "useful" (by whatever metric: technological progress, preservation of the environment, internal well-being e.g.) or less?

Trying to speculate seems fairly silly, though perhaps one could look to history (patronage, for example). I think it'd be even more silly to think we have things right right now (esp. considering fairly objective things like suffering that could be prevented or environmental damage that could be checked) and the idea should be given a shot at least in a limited setting.

Problem 1: the economic notion of value is weighted by wealth, but the notion of "human desire" you discuss is not. Entertaining a king is valuable, in the economic sense, but feeding and housing a poor is not. It doesn't matter if there are plenty of things that people want to be done, it matters if there are plenty of things that people with money want to be done. If all the money flows into a few hands, the demands of the many do not count towards stimulating the economy, and the economy is not stimulated.

Problem 2: leverage. The economic value you create is an upper bound to what you earn, not a lower bound. The lower bound is determined by your next best option, which effectively, in light of correlated risk, means there is no lower bound. The service you provide may be critical to the functioning of society, but if you are easily replaced, well, you aren't going to earn very much. In other words, even if demand increases exponentially forever, and you play a critical role in satisfying that demand, the economy does not guarantee that you will be able to extract money for yourself out of the process. See: crowd of artists trying to pawn their wares off on the king. Also, farmers.

Problem 1 and problem 2 combined are what make the "capitalist dystopia" a plausible, stable, and terrifying state of affairs.

Problem 3: deregulation does not necessarily return markets to a pristine state of natural excellence. No such state exists. Quite the opposite, in many cases. Regulatory capture is a real problem, a big problem, but it's only one of many factors that lead to sclerotic, anti-competitive markets. I'm regularly floored by people's ability to talk about network effects, economies of scale, information asymmetries, moats, winner-takes-all games, and mergers/acquisitions with one breath -- all of which are non-regulatory market forces that suppress competition and innovation -- and then with the next breath assert that deregulation is the most straightforward way to spur innovation and competition. See: Enron, where deregulation of the energy markets led to artificial supply shutdown (the infamous rolling blackouts) in order to drive prices higher and profit. Listen to the recordings of the traders literally giggling as they order plants offline, and tell me again that deregulation is a cure-all. Sometimes more regulation leads to better functioning markets. Utilities are the canonical example.

True - as a whole. But as things stand now, the owners of the machines get richer, and the displaced workers get significantly poorer.

My concern is this. In ten years time, trucks and taxis will be automated, and vanishingly few truck drivers will be able to retrain as truck computer techs. Truck and taxi driving is the last bastion of badly-educated men, (apart from the military, but automation will be gutting military employment too). So we're going to have a huge (many millions) population of (to generalise horribly) redneck men who like guns and feel worthless.

Even now, 2/3s of gun death in the US is that exact demographic suiciding. I believe these guys gave Trump his victory, and when they realise even he's let them down, those that don't kill themselves are going to revolt.

A UBI could be part of the solution to this nightmare, because it would take the economic aspect out of the equation. It would mean unemployment lost its stigma, because at least some people chose to do their own thing (playing music, carving wood, reading at schools) instead of working for the man. So it would become socially acceptable not to have a paying job.

Sadly I think it's very unlikely to happen, unless the rich figure out that their wealth is going to be redistributed violently if they don't do voluntarily.