How are situations like lack of liquidity to pay the taxes handled? i.e, As an employee you get stock options, which you exercise when you leave the startup. Then long before the company has a liquidity event the FMV shoots up because the business is doing well. How do you as a wage worker pay the taxes on your paper riches without a way to sell your shares?
I guess there would be all sorts of megacorps happy to loan you money for this with your assets as collateral. Remember London and Amsterdam have extremely strong finance industry lobbying, and that shows up in their lawmaking.
Checkout what happened at Uber [0].
My cousin at Aurora borrowed money for his tax bill on IPO. I don't know the final numbers, but I hope he at least broke even.
Real examples include: $GRAB, $AUR, $UBER
[0] - https://www.cnbc.com/2020/08/28/nearly-200-uber-employees-su...