I think frontier AI research should be outlawed until such time as there's a broad consensus on how society ought to deal with it. This would have to be coordinated internationally to be effective, but I think that would be achievable if the US sent a credible signal by forcibly shutting down any one of the major labs.

How would I know what's best? Anything to protect people. There are infinite ways to write regulations/measures, with varying degrees of results, difficulty, and severity. Obviously, while UBI might be a good idea or not in general, in this context it is on the low-results, low-severity, high-difficulty side (probably every solution is on the high-difficulty side, though).

Substantially increase the capital gains tax and cap inheritance to only enough wealth for a single generation to get by without performing any real work.

This might also come with the benefit of reducing the number of nepo-imbeciles running things now.

The easiest (and hardest) solution ever - fucking ban "offshores". So for example a UN session convenes and passes an extremely simple resolution - all members are instituting a minimum tax (say 15%, for example) for literally everyone and everything. And all countries non-complying must be completely sanctioned a-la Iran. This would take less space than a A4 page and super easy to draft. But of course absolutely impossible to ever pass, just a fantasy.

While this is counter-intuitive, since we are talking about taxing billionaires and megacorps etc. to the tune of >90%, but it would actually make those people and companies part with their gains, unlike 90% tax which will never work. Every single company in the world above certain size and every single millionaire and above, are employing criminal schemes to evade paying taxes, declare funds and participate in the economy in other ways. By enforcing a certain minimal tax and banning all "drains" the amount of accrued money would be astronomical. There would be no need for 90%, instead the crazy 50-60% taxes paid by the fools (actual middle class) could be meaningfully reduced to the levels half a century ago and there would still be money left.