The biggest problem with runaway inequality, however, is that it undermines the unity of purpose necessary for any firm, or any nation, to thrive. People don't work hard, take risks and make sacrifices if they think the rewards will all flow to others. Conservative Republicans use this argument all the time in trying to justify lower tax rates for wealthy earners and investors, but they chose to ignore it when it comes to the incomes of everyone else. It's only typical those not at the short straw of inequality have 101 justifications for it. But who ends up footing the bill?