I don't think you can talk about the money making aspect of the professions without talking about the horrible way that Bliz manages the economic aspects of the game. If there is one true, really hard core complaint about WoW, it's that almost no account is ever taken about the in-game economic impact of decisions.

On my server, in Classic WoW epics were selling 500-700g. In TBC they were selling 2-3 times that between 1500-2000g. In Wrath, epics are selling between 3-4 time that at 6000-9000g. That not merely incredible inflation, it progressively worse inflation.

On example is the way Wrath has nerfed TBC gathering professions to the bone. Adamantite ore is selling for 13g while thorium ore is selling for 60-70g. Sure it's the law of supply and demand, but its simply crazy when ore that in-game is supposedly more valuable (it takes a higher skill and and a higher level to mine) actually goes for a 5x less than less valuable ore. Even silver ore goes for much more than a adamantite.

So I really don't want to hear JC and Engineers cry. Stop being so narrow-minded and realize that problem isn't with just your professions, it's that the developers don't care about the impact of their decisions on the in-game economic: they never have and they never will. It's not what WoW is about.