Is income inequality morally wrong?

Over the past several years, elites in America have unleashed a tidal wave of propaganda about the curse of economic inequality in our country. President Obama has made it one of his signature themes, calling income inequality "the defining challenge of our day" in a widely reported speech in December 2013.
When reflecting on this topic, it is incumbent upon us never to forget the incredible suffering and the tens of millions of deaths which resulted in the Soviet Union, China, North Korea, Cambodia, Cuba and other communist countries whose goal was equality of income and wealth. The empirical evidence is clear that the utopian goal of economic equality destroys wealth and creates poverty in its place.