But the study doesn't actually study UBI. The problems with UBI are heavily rooted in the U -- what happens when an entire society is now making (X + Income)?

But the study doesn't actually study UBI. The problems with UBI are heavily rooted in the U -- what happens when an entire society is now making (X + Income)? Using any reasonable economics we'd assume that the price of goods would scale accordingly, especially at the bottom of the curve.