Makes me wonder what will happen to the parts of the economy that rely on jobs that people aren't lining up to do. I can imagine fast food getting more expensive, for example.
It could also get cheaper as a minimum wage is no longer required when you have UBI. People would work because they want $$$, not because they have to. This means that for many who would want to earn $2.5 an hour working a low stress job to pay for some simple extra things they can do so.