It doesnt and this is why, you have to look beyond the next 6 months to a year. Right now and even in a year what youre saying could be true to an extent. The more money one gains the less theyre going to grind payday for if no other reason it becomes not worth the grind. There will come a time where a smaller group of players will hold a majority of the wealth in game. When this happens it will become increasingly more difficult to get the lump sum of the upper class of player to trickle down to the new players because not enough of them will have desired goods like shinys or large amounts of cash to exchange with them. So it will help to bridge that gap, not completely but enough to help the issue by getting their foot in the door so to speak.
I agree with Vegeta on this.