Started with: While most of the world's richest people earned their money, some had farther to climb. Neither Bill Gates nor Warren Buffett inherited wealth, <- that's wrong, buffet had a significant trust fund from dead relatives.

Even most of the world's richest people earned their money is somewhat debatable, years of compound interest + a solid nest egg helped many billionaires along. And plenty of them benefited from more from less than ethical behavior and or luck than hard work.

PS: If you want to look for patterns look a little closer to the bell curve. Start talking about 1 person out of 6 million and patterns are next to meaningless.