It doesnt fit the leveling flow, yes you can make decent money quite easily (not as much as a new char though, running around farming copper against people with mounts that dont care about mobs at all does cut into the profits) but it doesnt fit the whole idea of fast leveling and 80 being the real game.
Its a major pita for newer players and it is imo not really needed. Level 1-10 in 15 minutes, great now run around for an hour to pay for the skills just isnt a good flow of the game, in my opinion.
Thus i think, a small gold income to offset the lack of natural income would do wonders for newer players.
(i have 80s on icecrown, this doesnt affect me personally, but it something i noted a lot, and i do give new players 10-50 gold whenever i can, just for that, before people attack me personally for being lazy)