The whole promise of UBI is that only those who like to work would do it, and people wouldn't do menial jobs because they could simply not do them - and thus th

The whole promise of UBI is that only those who like to work would do it, and people wouldn't do menial jobs because they could simply not do them - and thus the price must rise. Then, because the prices have risen, either UBI must be larger or it's no longer working as promised. That causes inflation, and again UBI must be larger.