Let's summarize:

airstrike: zero taxes on capital are a bad idea

mike_hearn: Switzerland has no capital gains taxes and it's great.

triceratops: Ok but it still taxes capital.

mike_hearn: I live in Switzerland. No capital gains taxes are great and everywhere other than Switzerland has a lower tax rate for them than income because we want more capital gains. Also wealth taxes can cause startup founders to be taxed heavily.

There's a bit of a disconnect here. You're arguing against multiple strawmen IMO.

Outside Switzerland the current situation is: regular people pay high income taxes while they work, then somewhat lower capital gains taxes in retirement. Ultrawealthy people pay far less of both because they have ways to avoid them (keep employment income low, borrow against wealth instead of selling it).

In Switzerland, since the wealth is straight up taxed, even if at a lower rate (I ran the Swiss wealth tax numbers myself a while ago and you're right it really is a very small amount. I pay way more in capital gains taxes) there are fewer games. Everyone pays taxes on what they make or own.

The startup wealth tax problem has another solution: allow payment in non-voting startup shares, instead of liquid cash. The shares go into a sovereign wealth fund. The government either reaps a windfall eventually alongside the founder, or it misses out on tax revenue it shouldn't have collected anyway (if you look at it from the fairness point of view).