I am not too concerned about "lack of gil". It is far easier for SE to add gil into the economy than to take it away.
Queue a Mogbonanza, or some random event that adds X amount of gil.

Besides, any significant $ input will be exploited by RMT. This way, they are forced to play the game as regular people...in other words, it no longer matters if they are RMT or not (other than the incessant shout spams).