The socio-political aspects of UBI will always trump the economic rationale, if UBI is passed it will be implemented by a capitalist regime consumed by decades of neoliberal bias and conditioning, for supporters of UBI to assume that a pro-worker version is in any way likely alot of ideal conditions will have to be meet

There's some serious Keynesian idealism among the supporters of UBI, and just like the first time the problem wasn't the economics, at least not in the short term, it was the inability to square the inherent capitalist revulsion to state guaranteed social welfare, a revulsion that will always lead to cutting, means-testing, and sabotage, and what guarantee is there that the stagflationary dynamic between robust wages, interest rates and profits won't be replicated between UBI checks, interest rates and profits by way of progressive taxation on the wealthy....unless that risk is eliminated entirely capitalists will anticipate and adjust to our detriment

Good UBI can't be implemented without a robust labor movement already in existence, without massive state intervention in markets and without a serious reworking of property rights