In my previous posts back in 2016 I discussed the idea of blockchain based basic income. In fact, I was one of the first to promote the idea back as far as 2014-2015 along with 
In my opinion this idea is workable and only political (and regulatory) barriers prevent it. Technically speaking we can do it even today but questions remain on if this is the right way to go about it. It can also be implemented by a mechanism I detailed as the anonymous benefactor bot network. These bots would be created anonymously (like Bitcoin was) and simply reward known accounts with tokens of value. This idea was also good but I predict there would be political resistance to this idea (rather than it being technically infeasible).
For more you can learn about the Benefactor Bot Network concept. You can also see this post "Project Noah's Arc - a DAC/DAO of arcologies can resolve global poverty once and for all.".
In my opinion all that is required are:
Ability to verify a unique human identity and connect it to an account. This should preferably be done in complete privacy and in my opinion it can be achieved using biometric+blockchain+sMPC (homormophic encryption). It an also be achieved using Johan's method of pseudonym parties where instead of a bot verifying your face using facial recognition or checking your passport via AI using sophisticated homomorphic encryption it is just people verifying people. I think ideally homomorphic encryption is more private because if you only have to show your passport, face, and other information to a bot, no human being has to see it to check it.
Ability to scale transactions so that microtransaction payments to all 7 billion people becomes possible if necessary. This is in the process of being solved but for now Lightning style networks can do microtransactions well and for more advanced stuff perhaps we can look to EOS.
Ability to have blockchain+machine learning. This is necessary in order to automate as much as possible so that the dividend or basic rewards or resource sharing can be sustainable (backed by something real). Growth is what allows for profits which can then be distributed to all. Done right, all can contribute to that growth to boost their profit potential long term.
