"In framing a government[,]….you must first enable the government
to control the governed; and in the next place oblige it to control itself."
– James Madison, The Federalist Papers, Vol. 51 (1788)

In a sort-of parallel vein, I've long suspected that the greatest challenge in devising a just and robust political entity is figuring out what to do with humanity's sociopaths.

Whether you believe in capitalism, socialism, anarchy or whatever, sociopaths will find the exploitable features in any system you design and, unless checked early and often, will eventually take over.

The challenge is, how to restrain them without curtailing the rights of non-sociopaths? Especially in view of the possibility that, like other naturally-evolved creatures that at first sight seem unnecessary or harmful, they might sometimes serve some purpose that's helpful or useful to the rest of us?

Andrew Carnegie is an example. The work rules in his steel mills (low pay, 12-hour shifts) were crushing to those who worked in the mills (including my grandfather in the early part of the 20th century). Yet he became perhaps the world's greatest philanthropist, giving away most of his money. Carnegie could be considered a social darwinist, but was an anti-imperialist and believed in the public interest.

2 million dollars. If they can’t live with that, find another country to live in.
But we know that would never happen.

Mega Millionaires and Billionaires would cry holy hell over having to depart with their hoards of cash over a specific amount!

They would cry to the heavens..."How will I manage to keep my fleet of Luxury cars, Yachts, and many Mansions up?"
As if the Walton Family(Walmart and Sam's Club) need more precious jewels, mansions, priceless works of art, or yachts to water ski behind.

They care NOTHING for the country or the people as they count their financial treasure houses.