Ignorant Retards these days...sigh.
"Whites" are rich because they come from a rich part of Earth. "Non-Whites" are from other parts of the world, places which aren't as useful as Europe's. Americans are not rich because they are white, they are rich because their ancestors were lucky enough to be sitting on a load of helpful rocks.
Way before that, it was definitely not white people who were rich in this world, just the people living around the Mediterranean, who were Black, Arabic, not white, etc.
Whether someone is 'White' or not does not assure whether they can run a country. It is their upbringing and wealth, and it tends to be white people.
Dubai, Japan, etc, They're all doing fine, and they're not "White"
Besides, Americans and British still cock up their country whenever they can.