The economy is fine the way it is.
I am really not understanding why there are so many complaints about the end game gil income. I have made plenty on and off the AH. The game was clearly made to make people work together, anything that you can acquire with gil, you can acquire without. You can repair your gear, you can pay others to repair your gear. The game was clearly made in mind with the community becoming mostly independent of the npcs. I teleport like a madman and still purchase repairs from npcs, with no problems. Are you speedrunning amp over and over again? Why are you passing up chests with items that their only purpose is to sell to merchants. I'll be honest, when the instance ends, I teleport back and get any passed chests in instances. You can't complain about a lack of gil income if you are running by money. If you are dying repeatedly, maybe you need to increase your gear, or skills. Go back to a lower instance.
Edit: Sorry about multiple posts, just found out how to use edit to break character limit.