One point to consider is that once UBI is rolled out, it can never be taken back, even if it is disastrous from a bureaucratic, economic, or social standpoint.

One point to consider is that once UBI is rolled out, it can never be taken back, even if it is disastrous from a bureaucratic, economic, or social standpoint. I think the success of UBI is heavily dependant on the details of how it is funded and paid out, and getting people to decide on what the best method is will be more difficult than getting it accepted.