Soviet Union and China didn't really have a universal basic income. They had a state defined income, if anything. Which meant you couldn't make more than that,

Soviet Union and China didn't really have a universal basic income. They had a state defined income, if anything. Which meant you couldn't make more than that, either. It actually has been "field tested" - and in the US of A, no less. The entire state of Alaska has a guaranteed minimum income. Granted, it isn't much - on average it's been about $1,000 per anum.