"We all end up working for people who are more successful than us," the presidential hopeful said.Asked if his flat tax plan would further separate the haves from the have-nots, GOP presidential hopeful Sen. Rand Paul (Ky.) said Sunday that income inequality is the result of some Americans working harder than others, rather than economic policies. "The thing is, income inequality is due to some people working harder and selling more things," Paul told host Chris Wallace on "Fox News Sunday." "If people voluntarily buy more of your stuff, you'll have more money." Paul has proposed what he calls a...