Nothing like turning the game into a job. All the legendaries and high value items will be put on the money market, so anyone who wan't to be able to trade anything will have to use it.
Not to mention people aren't going to waste time trading one item for another if they think they can get money for it.
I guess it can be good if you look at the flipside. I can pride myself in not being a pathetic loser who pays for pixels because they don't have enough skill to do otherwise. Might make a point in playing the whole game Iron Man style. Keep what you kill.