Despite being an ardent capitalist, I do not believe the majority of rich people earn their wealth. I believe it is more or less earned by a "founder" such as Joe Kennedy and then passed down to trustfund babies such as Ted Kennedy. Additionally you throw in how unqualified relatives and cronies are awarded jobs well before much better-qualified candidates and you can see how when I become king I will implement anti-nepotism legislation.
Regardless, found this chart interesting. Not that it is a call for socialism, but the gini-coefficient is starting to test my patience;