how about instead of restricting all ownership, you instead just limited it.

My idea is that basically once anybody hits 10 million in net worth (for example), then we just say ‘well done, you’ve completed it mate’. Now fuck off down the beach and don’t come back.

Basically tax any further income of any kind at 100%.

Wasn’t Saddam trying to move to selling his oil in another currency, which is one of the reasons he was invaded?