"Ultimately, if users want to purchase gold, they'll find a way to do it. The U.S. "drug war" hasn't stopped people from buying drugs, it merely causes fluctuations in the price of those drugs and the amount of crime and violence that people are willing to commit to buy and sell drugs. If we only try to attack the problem of gold farming by detecting and blocking the gold farmers we will not be effective in stopping that behavior and all of the problems that go with it, like chat-spamming to advertise gold-buying sites, purchase fraud, phishing, and account theft," Wyatt says.
He goes on to list EVE Online's PLEX system and Everquest's Vox and Bazaar secondary market experiments as potential "interesting solutions."
Check out TERAHispano for the full interview as well a companion gameplay-centric interview with Producer Sam Kim.