These all are very interesting points, but I think most are centred around unemployment benefits, rather than UBI.
This pandemic made me realise how fortunate we are for living in Europe - literally any part of the eu, has done a better job at helping people and making sure they dont starve, compared to the US. Thats a great observation! Europe is indeed very close to UBI. The only issue is it finances it through more taxes on an individual’s output and is not universal.
People who want more than basics can demand it as much as they want. Thats not UBI, thats lazy and scrounging. Go get a job. Period.
The point you are making re even more taxation is also spot on - that is why my view is that instead of taxing current workers even more we instead invest in tech that leads to even more productivity growth and we tax the difference in that new productivity gain.
I dread more taxation, as it usually means more taxes for us, less for those who disproportionately benefit from increases in tech and automation, due to the current economic system.
For example if BMW automates 10x more of their assembly lines, then tax the gain in productivity but NOT at a level where it punishes said growth, rather at a level where both BMW and the taxman are happy. Money go into a UBI pot much like norway’s sovereign investment fund.
Tech can be treated like a natural resource that we all own, but none of us have exclusive rights over it, while those who successfully exploit it will get more of the pie.
Apply the same to all sorts of manufacturing, agriculture and anything else that can be automated.
The money in that pot go to everyone in the country, and this is where UBI is radically different from unemployment benefits. Everyone gets a share, meaning those already in employment will get a tax cut and those not in employment don't get the stigma associated with benefits.
Dont worry about people immigrating to the us - the very workers we automate out of jobs dread us highly skilled immigrants, as they dint see the benefits from our work - more than taking pictures with shiny new iphones - and they want us to stay out, by voting for Trump.
TL;DR I guess I have a few random ideas about an ideal world where we use tech for building a star trek like society, where basics are no longer an issue and all we do is advance our society.