"I personally think that society is responsible for a very significant percentage of what I've earned."
— Warren Buffett, CEO of Berkshire Hathaway
"Self-serving stories of 'self-made' success may nourish the ego, but they mask the real ingredients of wealth creation and a strong economy. Where would the Forbes 400 be without public investment and infrastructure – from Google founders building on the Internet to Ross Perot and government contracts?"
—Chuck Collins, co-founder of Responsible Wealth
ResponsibleWealth.org - Forbes 400 Richest Americans: They Didn't Do It Alone
Kevin G is correct that we don't have a flat tax and that our system is extraordinarily complex. I said "somewhat of a flat tax," because the following two features make the overall tax on income much less progressive than many people suggest: (i) application of employment/self-employment taxes primary to earnings of less than about $90,000, and (ii) 15% tax rate on capital gains and dividend income.