Paul Campos points us to this chart from EPI. I'm not really sure that there is anything I can add. Under GOP economic polciies the rich have gotten substantially richer and the rest of us have been left behind.
Republicans bemoan redistribution of wealth but its clear that they are only concerened with equitable distribution of wealth. Their policies are clearly intended to redistribute the wealth of the nation further and further upwards. They have achieved this through tax policies, through deregulation of financial markets, "free trade" and by targetting the labor movement and labor unions for destruction.
Look at the chart around the year 1981 when Ronald Reagan takes office and center-right to far-right economic policies become the norm and look at where we are today.