one other idea I had was making a total new currency where citizens could only have one account, think - one bank account, that account then has a limit on how much total it could hold, therefore billionaires can't even exist in the system.

The coin would use smart contracts to tax all transactions but the tax rate is less for those who hodl less money (have less in savings) and for those who spend more per month (basically giving a leg up to those who spend like the poor, i.e. spend most of their money monthly...

if you combined this w/ govt georgist LVTs I think a fair system could be devised that still has people who are wealthy, but maybe 50 million is the cap, and maybe it goes up to 60 million when the average amount of monthly carryover in accounts is 10k, or something...encouraging more money to flow down, so the caps can go up... Something like this would need to figure out something else for business accounts to get ecommerce flowing and moving in/out of the system, since businesses can easily spend a billion a day or bring more than that in...

Haven't thought that far ahead. I'm also not a blockchain dev...so outside my wheelhouse..