From how I feel about the game so far in the way I spent my currency in game, I'd imagine the "wealth" would be summarized as thus.
Rich - 1mil+
Middle Class - 500k>
Lower Class - 10k>
Poverty - <10k
That's just my view on what denotes wealth in the game, since I at one point had 30k on my character from questing alone, and someone had mentioned they ran out of gil because of all the teleport costs so I handed them 10k to help them along. (That and I wasn't questing anymore so I didn't need the gil myself)
Rich - 1mil+
Middle Class - 500k>
Lower Class - 10k>
Poverty - <10k
That's just my view on what denotes wealth in the game, since I at one point had 30k on my character from questing alone, and someone had mentioned they ran out of gil because of all the teleport costs so I handed them 10k to help them along. (That and I wasn't questing anymore so I didn't need the gil myself)