There is 2 ways to make money in XIV. I've seen this time and again on this post, but I think it is important to note. You either farm Players or you farm SE. Player are holding money or can already make everything they need. All this has been stated. Leves, as nerfed as they've become, are profitable, especially in this economy. FC's should do a binge and use up a whole company's leves with everyone contributing to the crafting/fighting.
What needs to be done is give some kind of exclusivity to crafts. In XI, you could only max 1 craft per character. Not so here. Without that, there is no control over supply and demand.