> Then when unemployment is up and people are desperate, the socialists can purpose a UBI

This is not a pleasant transition. Expect poverty, homelessness, starvation, high suicide rate.

And if you think UBI will save you, think again. You won't be affording luxuries on UBI. Capitalists won't be sharing the fruits of automation in some utopian wonderland. You'll be scrounging to survive while the rich live that life.