"Fair share" today means an immensely disproportionate amount is paid by those scapegoated by the left and given over to the left's cronies, with some crumbs going to the poor, who become more and more entrenched in their dependence on the state, and more and more permanent clients to the state's war on the free market.
Benjamin Franklin predicted this(a form of it) on the floor of the Continental Congress:
Generally indeed the ruling power carries its point, the revenues of princes constantly increasing, and we see that they are never satisfied, but always in want of more. The more the people are discontented with the oppression of taxes; the greater need the prince has of money to distribute among his partizans and pay the troops that are to suppress all resistance, and enable him to plunder at pleasure. There is scarce a king in a hundred who would not, if he could, follow the example of Pharoah, get first all the peoples money, then all their lands, and then make them and their children servants for ever.
“There is scarce a king in a hundred who would not, if he could, follow the example of Pharoah, get first all the peoples money, then all their lands, and then make them and their children servants for ever.”
This sounds like Obama’s second-term agenda!