In principle I think some kind of wealth tax on fortunes above a certain level would be a good idea. But there are a lot of practical implementation problems in terms of identifying and valuing illiquid assets. Like for example I have friends who own forestry land (for softwood timber harvesting) in a foreign country. Those assets have some value but trade infrequently so there's no reliable market price. And they probably hold the assets through a foreign corporation rather than directly in their own names. What is a "fair" amount for them to pay in taxes, and how would the government enforce that in a consistent and cost-effective manner?
1) I'm amazing, I can solve any problem, I'm enlightened by my own intelligence, I'm the mover and shaker who drives all worldly productivity, and I do it by wrangling the newest technologies in the most imaginative creative and intelligent ways, no problem is too great for my superior intelligence!
2) Pay taxes? Ah but, uhh, that's impossible; like ... who decides? There, there's a dealbreaker for you! Hah! And anyway how much? I.. I... there's complexity, don't you know how difficult and complex it is to ... own a forest? Nobody could make a decision, I can see already that the combined might of a nation's experts could not come up with a figure, forget AI, this is just ... give up already, come on, some problems are forever out of reach.