I think it's already the case, the 90% you're talking about is debatable, we already live in an age where producing food and shelter requires so few people that

I think it's already the case, the 90% you're talking about is debatable, we already live in an age where producing food and shelter requires so few people that you can consider those jobs are already automated in some way. The result is that only the educated and the owners can work and be included in the economy, and unless higher education can include everyone, well you will always have uneducated people who will have no other opportunity jobs than fast food and cleaning houses, which is a problem, in my opinion, for a nation. The UBI is just a minimum people will get no matter what, so if they get a job it's an added income. Depending on its amount, it's a compromise between inflation and stimulating the economy without having parts of the US not develop. Consumer spending always has been the basis of a healthy capitalism, and the UBI follows that logic.