[Verdex]

> Most people will want to do something useful to supplement their basic income

Most people will want to do something to supplement their basic income. It doesn't have to be useful. In fact it could be to scam other people out of their UBI. Additionally, if we schism society into people who work and people who don't work, then it will almost definitely be to scam other people out of their UBI because that will be the most obvious course of action to get more money having been isolated from people who do actual work.