Political Memes

That's quite a shallow take on the whole thing. Universal Income's main impacts are indirect and affect the whole of society, for example:

• It allows people to give it a go as inventors or artists at any point of their lifes, rather than the traditional 2 points of "young adult still getting money from your parents" and "having retired (for a few by having made so much money that can retire early) and do what he or she always wanted to do".
• It places a floor on all incomes. Specifically if Universal Income is high enough so that people can afford housing and food from it alone, nobody will ever accept any jobs paying the same or less - all jobs will have to offer something beyond it to attract any workers.
• Less crime because the sorts of crimes that desperate people commit and other "low yield" petty crimes will pretty much dissapear because they're not worth the risk and people don't need to do it.

As for means testing it or not, it really boils down to the complexity and cost associated with means testing: if it's cheaper if not means tested, why do it? It suspect Jeff Bezos' "pleasure" in getting Universal Income will be nothing next to what the losses from not to being able to pay shit salaries and treat his workers like shit anymore will make him feel.