This entire blurb could be applied to the Shadowlands expansion launch, and it would be rightly laughed at. The idea that players should have to sacrifice hundreds of hours of progress going into a new expansion, without warning and without this precedent being set prior to Classic, is insane. It's not fair to the active player base, it's not a reasonable request, and there will be no meaningful change that will occur other than inconveniencing most players.
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Your reasoning is flawed. A gold wipe would not curb those who have cash stacks in the tens of thousands from becoming dominant again, all it will do is leave the majority of players without any funds needed in order to participate in the economy effectively. Here is what will happen in TBC: the best farming areas will be held down by the dominant faction, likely shared between a coalition of dominant guilds similarly to the Devilsaur Mafia. All other effective farming spots will be a competition between groups of the minority faction and smaller guilds of the dominant faction. Players who have not hoarded some degree of gold, typically casual players or raid loggers, will be relegated to slow, inefficient farms.
A gold wipe is not going to stop the currently established dominance hierarchies from being reestablished, it's just going to severely penalize players who do not have the fortune of being in a dominant guild or being part of the dominant faction.