Nobody should reasonably expect others to change this practice of clear-selling, because it's much too profitable. We must ask the developer, how do we achieve a more egalitarian system of keeping the casual and hardcore crowds happy? It's quite simple, split end-game raid dungeons into normal and hard modes, just like Yoshi-P plans to do in Heavensward (in the Alexander raid dungeon). The people that clear hard mode Alexander get the best gear for putting in the hard yards, which is a fair system that should keep the upper echelons of "Elite Gaming" sated. Meanwhile, those of us not enrolled in the MLG program must be content with getting less-powerful gear. It's only fair, because like the real world - FFXIV isn't here to hold your hand to get the best things (unless you are willing to spend millions of gil on a carry). I think most reasonable casual players would (and should) be happy with getting the same gear as the "Elites", but with inferior stats. Heck half of why I play this game is because of the glamour system. But let's not pretend that people actually care about some sort of moral dilemma when it comes to throwing money to buy progress.
Personally, I am very interested to see what the main differences in loot are in Alexander. I am very happy to learn that it will be split between the hardcore and casual playerbases. If the casual players can earn similar-looking, but less powerful gear, that may stop the PF being clogged up with paid carries once and for all. Until such time, I don't see how complaining about people buying or selling progress will fundamentally change human nature. It's business as usual until 3.0.