Because inequality creates incentive. The bigger the difference between the bulk of the society and the top percentages of earners the more people are willing to risk to reach the top. That’s why there are more successful startups in the US than in Scandinavia.

It’s a global rat race and the US is “winning”.

Adding AI is like adding a lane to a crowded street. It will move more cars per hour, but the street will soon have the same traffic jams as before.

Workers will be as busy and as overworked as before.

Plus, even though people theoretically do more, it is not really more. For example Digital Signage - before generative AI you would put in some text, a clipart or a stock image and call it a day. Now one may be expected to polish the text with AI plus generate a more fitting image. Does it make a nicer Digital Signage? Sure. Will productivity actually go up? I doubt it.