Quote Originally Posted by Duuude007 View Post
Point A: Cash to gil conversions allow Player 1 with money to purchase rare, high-end goods in a fraction of the time it takes Player 2 to farm the same gil
We already know that rare high-end goods will be untradable. Full stop.

The rest of your point is made moot just by this, without even going into the fact that the "newly rich" players that can afford the items are completely offset by the fact that those that gave them the money have that purchasing power subtracted from their total, keeping demand on the same level.