Article author here. I don't get the sense that he's just talking about a living wage for marginal workers. That is a longstanding demand from the church, but the language here is different. To speak of "universal" and "basic" here is a clear nod to UBI of some sort, as are the references throughout to care work and activist work, which are never going to earn a wage in the labor market.
+1 on the point about hedging against technocratic solutions, however. He expands on that language a lot in Laudato Si. I should have highlighted that in the article. Unlike many Silicon Valley UBI advocates, he does not see this as a simple, algorithmic fix, but his emphasis is on the way it could help bring about cultural change, transforming what kind of work we value and orienting the economy toward a recognition of universal human dignity.
Will check back to chat more. Fun to see this show up in my HN feed!