Even if they were to implement it in XIV, where you can spend money on items and such... limit it to certain servers. If WoW can split their servers into "Go here if you want world PvP, go there if you don't", why not split servers into "Go here if you want to be able to pay money to buy items, and go there if you don't"? That way, SE can still benefit from the profits that MT would bring in from the people who want to pay for them, and they don't have any effect on the people who want nothing to do with it. Because the way I see it, if you put people who are going to do it on servers with people who refuse to, you have an instant rift that is insurmountable.
Wow, easy, yet effective solution, for a problem that I'm sure worry many gamers out there O.O rate up :)