Comment by alistairSH

None that I've seen, though I'm sure somebody somewhere has introduced something.

All that I've seen are wealth taxes on top of some arbitrary (but very large) wealth level. The latest proposal from Congress applied a 2% tax to wealth above $50 million with an additional 1% (3% total) on wealth over $1 billion. Plus a 40% exit tax to stop them all from fleeing to the Bahamas or Monaco.