The rich are not just the billionaires. Try anyone who has enough that they'd never have to work if they didn't want to. Which is anyone with about $10 million and up.
"Sixty-five percent of the ultra-rich made their own money, while an additional 16 percent inherited a portion of the wealth that they grew to a larger fortune. The self-made rich have an average net worth of $142 million, versus $130 million for those who inherited their money."
http://www.bankrate.com/financing/wealth/myths-about-the-ult...