While I agree RMT is a disease it currently isn't the biggest problem thats causing the in-game economy to suffer. Realistically, Free Market economies dont work in video games as NPCS and Players do not need to make a profit to get by, meaning no inflation so players can continue walmarting items well below NPC asking prices. The fact we can get all the items we need for a specific need also destroys the idea of Supply and Demand.

Right now the world of FF14 is entirely a resource based economy, You want something, you can go get it free of charge, unfortunely with gil being used a gate for certain upcoming features this creates pseudo-capaitism ideals on an economy that has no need for currency. Both economy types are extremely flawed in virtual settings however, Free Market and Capitalism invite more RMT transactions, while resource based economies invite more greifers.