Scalpers just exploit the capitalistic system. You can make money however legally you want but this isn't illegal. It's just morally wrong but who is to judge. You can do the same too but obviously you don't have that effective workforce these scalping gangs have.
Don't hate the players, hate the game!
I'm not even sure I agree that it's morally wrong. Where are the morals here? And whose morals are we referring to?
The fact of the matter is, if the scalpers were well-dressed and polite, I'm pretty sure there would be much less controversy. Scalping is just fundamentally capitalism at its basest form. That's all.