Unless you are arguing that taxation per se is unjust (which I'd disagree with), I don't see how you can argue that a UBI is wrong in principle, seeing that tax

Unless you are arguing that taxation per se is unjust (which I'd disagree with), I don't see how you can argue that a UBI is wrong in principle, seeing that taxation of work is not the only way to finance a UBI. Private property takes wealth out of the commons.