As for people not being occupied, the theory is that since ubi doesn't stop if you find employment, it would lead to less idleness than the current means-tested social safety nets. In test cases though it seems to depend a lot on culture, Finnish communities saw no difference in employment while Indian rates of business formation tripled.

https://news.ycombinator.com/item?id=46977175

Not quite UK, and not very big, but somewhat promising :)

>How do you uphold democracy

https://www.cambridge.org/core/journals/perspectives-on-poli...

>Multivariate analysis indicates that economic elites and organized groups representing business interests have substantial independent impacts on U.S. government policy, while average citizens and mass-based interest groups have little or no independent influence.

Can't uphold what isn't there, lol

As for how do we avoid becoming WALL-E blobs... elite opinion seems to suggest the UBI will be just enough to prevent people from going into the streets with pitchforks, but not enough for a dignified life. (Enough to live in ze pod and eat ze proverbial bugs.)

I don't see employment being a very big thing (unless AI creates some kinda fake jobs economy to pacify the humans, which would be a rational thing to do).

The crisis of meaning is going to be worse than the economic crisis, and I think people would literally pay to work rather than question their existence on such a deep level.

Beyond fake jobs and human-only jobs (robot can't replace the cute barista at Starbucks!), I think entrepreneurship will be the only real vehicle. So... basically how it already is today.