To be fair, though, @Aeg, nobody does those dailies anymore. Is sort of a fun brain-exercise, but my experience tells me that a lot of gold goes into levelling-alts. For those folks who don't monetize their professions, they're frequently pretty poor.
At this point, it's safe to say that we don't take out more than goes in. Were that the case, the game economy would have fallen by now. There does, however, remain an income disparity, which is affected by many things. I feel that things are in a good place now. I can't imagine the game maintaining balance if Cata->MoP follows the Wrath->Cata inflation model.