The only reason the Soviets didn't have a true UBI is because they realised they still needed people to work and they wouldn't if you gave them what they needed for free. That's why I said they had what was effectively a UBI, they decided what people needed or were entitled to and created a system that would give them only that. The fact that they forced people to work is an implementation detail that we'd likely run into in the US today as well, we couldn't afford for the government to cut checks and no one work.

I did respond earnestly, whether you accept it or if I'm explaining myself poorly. You have yet to propose how a UBI would actually work, or pointed to an example of it ever having worked in the past. Socialism and Marxism have been tried, the don't work. And yes, UBI is an idea that goes back to Marx's writings.