I realize that I, as an individual can make choices and am responsible for those choices. I'm not here to talk about that today, I'm only referring to the fact that when a natural human failing is set upon by money men with the intention of exploitation it is only regulation or destruction that will end that exploitation.
I'd say make a progressive scale such that 1 billion is the theoretical limit, meaning you would need infinite gross/pre-tax wealth to exceed 1 billion in net wealth after taxes.
In a republic the executive is answerable to the law. We're neither a democracy or republic.