You know if you render gil useless as a means of currency something else would just take its place as tender for trade. Anyone who played Diablo 2 way back on the realms would know exactly what I'm talking about.

Other than that you're not as clever as you think you are, anyone could figure out that if you destroy any possibility of an economy you won't have RMT. Keeping RMT at bay while having a healthy economy however is tricky, a healthy economy is one that encourages trade and investment, which is inseparable from RMT.

Also why exactly should my wealth belong to my FC, last I checked we don't live in communes.