If a UBI was big enough, steel workers could go back to work. They could run a factory and make steel, at a loss, but it wouldn't matter because doing something

If a UBI was big enough, steel workers could go back to work. They could run a factory and make steel, at a loss, but it wouldn't matter because doing something useful (making steel) is decoupled from their livelihood. And for the people who want to get that sense of usefulness another way (raising kids, teaching others how to make steel, playing video games, building houses) they would have the financial freedom to do so.