Was this just general derision in the form of "people on twitter" or had an economist somewhere made a cogent economic rebuttal? It's the latter I was interested and hoping someone could point me in the direction of. Not particularly interested in hearing what twitter person thinks about UBI-I'm rather ignorant to certain economic arguments about UBI myself, and am trying to address this, if that makes sense.

I doubt any serious economist could corral up enough spare tike to waste on a rebuttal of this idea. Not every idea rises to the level of serious discourse. The Yang UBI amount was much smaller than the amount paid by social welfare programs to the people who receive them. That's just arithmetic.

>I imagine he's talking about the response to the Yang campaign,

This predates Yang. Yang like all libertarian-UBI advocates, typically side-steps this issue.

Yang specifically addressed it in allowing people to choose one or the other.