I used to think a universal basic income would make sense, especially in developed countries, only for the near future scenario of machines taking ever more jobs. We know that this has always happened in history, and new jobs were always created, but that doesn't mean that the rate of job creation vs destruction will remain the same, forever. What made me change my mind about UBI was to realize that a) human desires…
The more concerning problem which comes up in this article is that you cannot have both UBI and lax immigration/easy freedom of movement. The first country to institute a UBI would be quite appealing to the billions of people living in destitute poverty, and they would all want to emigrate, making it almost impossible to get into the country. How do you decide who gets in? Do you require the person was a citizen for 18 years before qualifying? You certainly can't have open borders or the welfare system would quickly be overrun.