I've never understood why UBI proponents aren't connecting the dots between "inflation has made everything more expensive so we need UBI so people can get by" and "printing money directly causes inflation".
Stable, positive, and modest inflation is actually a good thing! It's a major feature of being able to control the money supply: it is instrumental in preventing deflationary spirals, it circumvents the sticky wage problem, and it transfers wealth from debt owners to debtors.
This is not to say I am a big proponent of UBI before other better-tested solutions for the more pressing problems people face, but what you are suggesting is not, by and large, what is happening.
edit: Sorry. I thought I was in a different subthread.