After all capital should go to people who can best use it.
Did you also create as much as value as Mitt Romney? As many jobs created?
If not then i think he deserves more money, so that he can continue doing that.
If James and Bob both make $100 but James invested that money into company (which used his capital to create more jobs) while Bob simply hold onto that money, I don't see anything wrong in James ending up with unfairly large returns (along with low taxes) since that's what's best for the economy.
Bob might be working somewhere, buying stuff for his family, indirectly creating jobs but if James money creates more jobs and value, he will likely a better bet.