Then who would play my games?
Seriously, I think the way we buy, sell, earn, is great. It's not perfect but I feel there is enough stopgaps in place to stop inflation. Like mentioned above, playing the market is a mini game. Like base buildings and badge collecting.
If everything was free I feel it would be boring. You can go on beta and get what you want and I can't recall the last time they wiped it.
Just like power leveling. The times I have power leveled a toon, I ended up not liking it because I didn't know how to play it and I had zero attachment to it. I think players would lose their attachment to a game that becomes zero effort.
That's my two cents.