I think they’re saying 2 car lengths when in heavy traffic going 20 mph. I hope…

Stem cell research

It's a fair question. The first universal basic income experiments have just begun in the last few years. Based on this article there's been a little success at least.
https://globalaffairs.org/bluemarble/multiple-countries-have-tested-universal-basic-income-and-it-works

I think we're only recently getting to a level of technology that we need less human workforce and can still prosper when inevitably some choose not to work.