I notice that progressive bloggers and Tweeters are pointing and laughing at poor little Mitt Romney for his sudden outburst of populism. But it seems to me that, as pleasant as laughter is, what’s really called for is a smile of grim satisfaction. He has told the truth - albeit probably insincerely - and there’s every reason to hope that he and his party will come to regret it.
It is among the core Blue-Team beliefs  that the current level of income inequality is unjust, inefficient, and socially destructive, and that public policy should attempt to reduce the degree of inequality.
The Red team - up until today - has believed, or at least said, that market-driven inequality reflects natural differences in economic contribution and is therefore just, while taking from “producers” and “job creators” and giving to the “47%” is unjust, and that the great inequality of outcome maintains incentives and thus contributes to efficiency. They love to criticize redistributive policies as “class warfare” and emphasize the importance of making the pie bigger rather than carving it up more equally, along with (formal) equality of opportunity rather than equality of result.
So when Mitt Romney describes rising levels of disparity - the rich getting richer while the number of poor people increases - as “income inequality getting worse,” he is making a major rhetorical concession to the good-guy side.
Of course he doesn’t really believe it, but hypocrisy is the tribute vice pays to virtue. Once the GOP concedes the claim that, from where we stand now, more equality would be an improvement, I don’t think it’s hard for the Democrats to win the argument about whose policies would do better at moving money from the rich to the middle class and the poor.