Yes, Social Security and Pension benefits are indeed a form of UBI, earned through employment contributions. Also to add to your points above, in the scenario

Yes, Social Security and Pension benefits are indeed a form of UBI, earned through employment contributions. Also to add to your points above, in the scenario where all possible low wage jobs are eliminated through automation, this would require a dramatic restructuring of the labor pool and economic environment. This is further evidence of the role low wage plays in current economy. In the situation where low wage jobs are fully eliminated, all that remains are concentrations of high wage / self-employed pools and a very large amount of automation systems that would require management. Perhaps one alternative to UBI is the creation of patronage systems that can support human endeavors where no productivity output is required, but human creativity output is desired. Something to think about.