Conditional social benefits are always a nightmare in practice. Look at the rules to qualify for that high school style test or prove that you actually achieve

Conditional social benefits are always a nightmare in practice. Look at the rules to qualify for that high school style test or prove that you actually achieve the milestone. Assume they will be implemented by the most incompetent of bureaucrats (eg. months to get an appointment, buggy Oracle software). Assume they will be implemented by the most nightmarish of your political opponents. Look for instance on rules for identification for voters in the southern USA. In theory that makes sense! In practice it's cynically implemented to systematically prevent certain demographics from voting. The main advantage of UBI in practice is that it's no questions asked. Anything else about it can be replicated by fiddling with tax and welfare bracket numbers.