Just as an aside, inflation in XIV is so bad they're reducing everyone's gil stock by 90% for the version 2.0 rollover. XI's never had to undergo anything like that, not even during Christmas 2005 inflation.
Actually, no, inflation's nothing to do with it, by saying that's the reason for the gil adjustment you're merely showing your legendary ignorance.
The fact that I barely played the game at all and had half a million gil at final save yesterday is a pretty clear indication that inflation was rampant. I never farmed, all I did was leves and quests.
The formal term they are using is "currency re-denomination" but that particular economic term is used to combat.... guess what? Inflation.