Some people believe that government issued ID in conjunction with a government that implemented a UBI scheme would indeed improve poverty. Andrew Yang wrote a reasonable book about the idea.

sybil-proofing in blockchain systems opens the possibility for any person or community to take a shot at implementing UBI. Could someone succeed in creating a token that retains some level of value long term and also consistently tops up at some rate in everyone's wallet? Beats me. But sybil-proofing is absolutely blocking issue on that front.