We have distribution and allocation problems, but we definitely have sufficient productive capacity to provide a reasonable standard of living. Even if you pic

We have distribution and allocation problems, but we definitely have sufficient productive capacity to provide a reasonable standard of living. Even if you pick a standard of living that makes this premise not true, this is still the primary motivating premise for UBI. This is why UBI is so closely linked with the rise of Automation to a point where there simply won't be enough jobs to retrain people to do.