[JohnnyB]

Scarcity and UBI aren't in conflict with each other. Scarcity is a relative concept. Average Joe's in developed countries today live with greater excess than kings of the past, but don't feel that way because they see others with so much more than they have.

For that reason any move to a UBI may face less of a right-left ideological division than expected. In some economic scenarios UBI might become necessary for a capitalist economy to function, as there won't be sufficient consumers without it. At the same time, there will be ample room for businesses to generate massive profits and inequality in living standards will continue to exist. So, the capitalist incentive and system doesn't necessarily go away with a UBI.

To add to that, it should also follow that thinking of a society with UBI as some utopian future is very optimistic.