An easy way to deal with it is to take volunteers, several hundred+ per server, to police the game. Give them instant ban ability so they can banish RMT on the spot. Sort of Jr. GMs, so to speak. They design a new BAN RMT option in menu or command > only volunteers are given links to download and install special BAN power update to their games(or disc in the mail or whatever to ensure security) > etc. If anyone abuses that power to ban innocent players because they had words or some dumb reason then after that person files their appeal and the ban is overturned(or real GMs police the 'policers' to ensure no abuse occurs), said abuser is banished themselves. This is the easiest and best way to do it. It's a thousand times easier than whatever it is they are doing right now to combat RMT.

But it's not ever going to happen. The day SE allows us gamers to help run their MMOs is the day I fall over dead from a heart attack as a result of seeing them do it. Also I have a funny feeling that it's not really an option or the fault of SE because it involves legal shit, like we'd have to be paid to do it because it's not a free MMO, or whatever. In any case, I don't know why they are having such a hard time with this. They stopped rmt tells in XI like a pro so maybe it's just sheer RMT numbers that are beating them here.