It doesn't matter whether or not people would build back up gil again; that's okay, and we want them to do that - what it fixes is the total amount of money in the economy. So say there is 5 trillion gil in the game right now. You take all of that value and reduce it down to 1 billion gil [or whatever fits with the current income/inflation levels]. Everyone keeps their relative wealth, but prices for all items will instantly adjust lower. The people who were the richest continue to be the richest, although a few will be less wealthy than they originally were, while others become more wealthy based on how tiered structures work. The poorest remain the poorest, and their position is maintained by the new income structure from the new economy.
The object isn't to tell people they can't be wealthy - the object is to make bow worth 100,000 now worth 10,000 tomorrow - but still maintain the same amount of wealth burden on the economy and players.
Just to repeat again the problem isn't that some people are rich [I'm relatively wealth in the scheme of this], the problem is that there is massive hidden inflation due to a low player base and low demand, even though there is a massive amount of gil floating around in the game.
There's no falling behind with this idea, because the new economy is structured with an expected income level, so it's not like someone is going to magically fall in their wealth position, because they're going to have the same purchasing power position and the same ability to continue making money; it's just in smaller; more manageable denominations that eliminates the pre-rewards adjustment/ pre-implemented gil sink inflation gap.
http://forum.square-enix.com/ffxiv/t...182#post474182