Oops, I think you may have answered your own question. (assuming you are right of course)!
The effect comes from the pay boost and greater prosperity in Romney's 47%, and that is way more than 2 %!!!! This is a case where a rising tide lifts all the little boats and leaves the big yachts untouched (they're either moored in deep water or sailing the high seas, whereas the little guys are currently high and dry on sand bars.) This is demand side stuff we are talking about; not supply-side stuff that is the darling of every red blooded Republican, but unfortunately trickles down too little to float even the smallest of boats.
Kind of like trickle up economy but it never gets discussed because GOP prefers trickle down where the rich get all the benefits and tax breaks and hope they pass it on haah