> I know some of my fellow progressives believe that we can offer UBI sufficient for basic necessities and people will still choose to show up and stock shelves

> I know some of my fellow progressives believe that we can offer UBI sufficient for basic necessities and people will still choose to show up and stock shelves, scrub plates, plunge toilets, or trowel concrete for $10/hr of 'fun money' opportunity This is a strawman. No one expects people to still do that for $10 an hour, that's not a lack of thought from people promoting UBI, that's the feature they want delivered. The idea behind UBI (or another scheme that would actually work, anyway), would be that 1) you plunge your own toilets or 2) if you want someone else to do it, you pay them accordingly. In such a society, your farmers, builders, utility providers, tradespeople and so on would likely earn more, and educated white-collar jobs would likely earn less relatively. This is already what happens in more limited subsets: devs that want jobs in an interesting sector like the games industry typically earn less than devs taking soulless corporate jobs like banking or ad-tech. Lawyers that work for NGOs typically earn less than lawyers that work for the above soulless corporations.