Why is this not the solution?

[ItMe]

Probably the biggest cause of inflation in the game is the gil cap. There's no reason for gil cap to be 999,999,999 per character/retainer when the largest game controlled purchase price is only 50,000,000. That's an insane amount of gil that can be accumulated compared to the typical gil reward for game play (usually between 500 and 8k gil).

If SE is really concerned about inflation in the player economy, they need to remove the ability to store gil on retainers and slash the gil cap to 100 million. That's high enough for a player to comfortably accumulate what they need to get the most expensive game purchases while reducing the gap between the rich players and poor players considerably. The poor player will have more buying power because what they have will be closer to what the richest players have. The rich players will still have more of the fun items and be more effective at making gil when it's time to replace what they spend but prices on player to player transactions would be reduced considerably because no one would have as much to spend.

That's an interesting idea, though I wonder how it might change people's approach to crafting when it takes 1/10th the time to cap gil and be "done" making money.
Maybe SQEX would just need to make a more gil sinks and "fun items" for people to buy, but I'm no virtual economist.
Either way, you're right, the gil cap feels nonsensically high.