Here’s an idea. Don't change any taxes, billionaires don’t like that. Instead, let them amass wealth as usual. But once a year we pick the richest 5 people, execute them and distribute their entire wealth.
Maybe not the 5 richest, but a random sampling from the top 50 (we can work out the exact mechanics). Keeps it spicier, and the ultra-wealthy love feeling like they're gambling.
And this is why I view so many charities sporting a family's name that's also sponsoring it as complete shams. Sure, on occasion they do actually conduct real charity, but more often than not it's just a way to funnel money from one source to another to avoid taxes.
Every new generation goes through finding out that we're nothing but pawns for the rich, get angry, protest... I wish we could skip that part and start at angry so we can get to revolution before people move on. I think we should actually eat one billionaire, to prove a point. I'm a vegetarian but I'll take a bite of the billionaire to prove my dedication