The impact of AI is a big worry. I don't know how we safely navigate through it.
But what I'm sure of is that we won't end up with the society you seem to be hoping for: with a small number of tech wizards working and providing for the rest of the UK's 70million and growing, very culturally heterogeneous population to have a good lifestyle whilst not working. Especially as that worklessness and lack of contribution from large parts of the population continues to result in the country degrading - with potholes, anti-social behaviour, long waits in hospitals etc. And people loudly complaining that the very people supporting them aren't 'paying their fair share'. Why in earth would those tech wizards choose that?
Wishing for that is like wishing for endless free energy and proposing we invent a perpetual motion machine.
Human behaviour might not be as consistent as physical laws, but it is just as great a folly to ignore it.
-Human relationships are based on reciprocity. Not always equal, generally the reciprocity is transitive and 'pay-it-forward', and easily allows for time - but not forever. But at their fundamental core, reciprocal
-People will always tend to the option that they judge results in the best overall outcome for themselves and their family (and a circle of relationships which weakens as it widens) from the options they have
Autocratic attempts to force massive redistribution (communism) have always failed. They have always resulted in suffering and lower living standards for everyone. Always. I very much hope the UK doesn't ignore history and sacrifice a generation to prove the same thing again.
If we attempt to go that route, we will instead end up with a very poor country with no one having much at all. And if we do it for long enough - 2 generations should do it - we'll lose all the experience, knowledge and cultural infrastructure which enable the incredibly high expectations of living standards we have. The UK's current wealth - and resulting complacency - is the rope we're on course to hang ourselves with.
Ongoing national wealth is far, far less reliable than human behaviour.