@Mciahel Goodman, the right-wing reference is a good one. In fact, in Canada, the main proponent of UBI has long been a conservative senator who primarily saw it as an efficient tool to reduce government bureaucracy, due to UBI's potential to replace a complex patchwork of benefits.
Ultimately though, whom it appeals most to depends on perspective and implementation.
For me, for example, it's obvious that a UBI would have to be accompanied by minimum wage laws that guarantee that people on full-time employment earn as least as much as their UBI would give them. Otherwise, as you say, you can end up with a situation like now, where Walmart in the US pays some people so poorly, that they are eligible for government food stamps. (That they spend at Walmart!)
Another thing to add here is that UBI doesn't have to be seen as a purely financial phenomenon. Having this sort of social security allows people to have greater confidence in their financial situation. For example, they are more likely to take time away from work to pursue further education or retool - as I think the Manitoba pilot showed. It might also augment entrepreneurship, as e.g. Sweden has higher levels of that than the US (yeah, virtually zero of the US's national myths are actually true), precisely because people know that it won't wreck them for life if their project goes wrong.
I guess these last two again economic examples, but just to say that the ramifications of UBI can be quite widespread (and positive).
Good point, I hadn't thought of that. UBI anyway has some complications, as what constitutes a liveable income can vary considerably in different regions of a country. So there would have to be some kind of evergreen table indicating what money buys you in different areas, with top-ups related to children, disability, and possibly other things.
That's not so complicated though. Statistics Canada is already working on something like that, for example (not in a UBI context).
Sorry, I'm not sure what this responds to. I said that I think that UBI should be a priority for every government, and I'm well aware that there don't seem to be a lot of governments agrees with me.