This does seem a bit of a chicken and egg issue. If more countries followed suit, same as much of them followed suit on almost all other taxation schemes that were put in place in the past, then it's just a matter of time.

And the US is not Sweden. If the US blocks your company's access to its market for leaving or not paying taxes, you'll most likely lose more money than the tax.

Not saying I'm pro wealth tax, I'm still having to think about it, but I do feel the US is in a position to be able to protect itself from founders leaving.