If AI improves human productivity so much that millions of people no longer need to work that should be an incredible thing. But the flawed structure of our society punishes those people rather than freeing them to persue endeavors that interest then.
Anything based on a free market just ends up in.. this.
We can also remove all of the loopholes that result in the biggest companies paying basically no taxes. I also think it may make sense to have a dramatically different tax structure for businesses than effectively income tax.
Outside of really bad luck I've never seen a case where someone was in a situation of working hard + making reasonably okay decisions + struggling, and that's purely due to there being avenues available where you can be rewarded well for your effort if you're of average+ intelligence.
AI is threatening to take that opportunity away.