Fact: The plan is about replacing you with robots at work so they can rake in more profits. In return you get to go on welfare rebranded as UBI. Look it up UBI is about automation AI replacing humans for profit. (see geordie rose) So your 40k job becomes 10k to 15k welfare. MegaCorps pocket the rest of your wage as reward for selling you out to UBI and AI.
The more likely outcome is that prices on a whole lot of things are about to drop drastically. Of course this does nothing to help the people who are left out of a job and can no longer contribute as they are no longer cost-effective. UBI is one option to address this, at least partially. Do you have a better one? Ban AI? Do you happen to be an anti-capitalist, and your convenient solution is (big surprise) to remove capitalism as an economic system?
I'm not saying the effect of more people being outcompeted from the job market will never be a problem. Perhaps parts of it will be solved with income redistribution being increased. Perhaps part of the effort will be in creating new jobs where humans can not be replaced. Some cookie cutter "anti megacorp" rhetoric ain't likely to help much.