"The American wealthy benefit greatly from the country’s legal system and business transparency, not to mention its armed forces."
I guess you'd agree or disagree to the extent that you believe the US military, government, and courts are required to maintain a safe, stable world where trade can take place unabated enough to allow the rise of a global elite. It's not just the US, of course - you could also ask if the haven of Monaco could survive without the military strength of nearby european powers.