[imron]

One, there is no practical way to roll this out across an entire society without government involvement. Businesses and wealthy benefactors can make it work for small trials, but large scale society level in a western democracy? It will need government involvement, and even if you try to do it without them, they will stick their nose in it anyway whether you like it or not.

Two, ideas and reality are very different things. The idea of communism is that everyone is provided for and people give what they can and only take what they need. Sounds great, very altruistic. In reality, it's been a nightmare everywhere it has ever been implemented at a societal level because the idea fails to take in to account human nature. UBI proponents overlook or understate this factor too.