ProPublica reported Tuesday, citing confidential IRS records it has seen, that some of the world's most prominent billionaires have paid the lowest federal income taxes in the past few years, and even a penny has not been paid. Amazon (AMZN. O) CEO Bezos did not pay any federal income taxes in 2007 and 2011. Tesla (TSLA. O) CEO Musk will not pay federal income taxes in 2018. The report also noted that a spokesman for Soros, the financial magnate, told ProPublica that Soros did not pay federal income taxes between 2016 and 2018 because of investment losses.