Opponents of UBI, at least in the US, will never accept it on moral and definitely not on socialist grounds - only possibly as a means of cutting Federal expenditure and reducing or deprecating existing social programs, which they disagree with on principle.

If Americans want UBI, they'll either get it with the repeal of the minimum wage, medicare, medicaid, federal student loans and the complete privatization of healthcare - basically the dismantling of the entire social safety net with the exception of programs to aid the military and agriculture - or else opponents will sabotage what futile efforts are made the way they did the ACA, and then work to repeal it as soon as possible.