Gold pieces essentially never leave the economy without actual gold sinks, they just change hands and continue piling up as more is constantly added here in this kind of a system.
Resources on the other hand are regularly consumed and disappear from the game, depending on the need/demand for these resources, many of them bought and sold with those same GP + all the new GP that are constantly added, and so on, and so on. And this pile of GP will keep growing totally unrelated to the cycle of resources consumption and whether or not if that goes up, down or stays more or less the same, it doesn't matter.
Now, If resources are not consumed quickly enough, compared to the rate at which they are produced, this can cause a drop in value of said resources (or the other way around) -Supply and demand.
This is a seperate "issue" to GP inflation.
You seem to be confusing the different mechanisms here, but it's late and it's honestly hard to even know what you're talking about at this point.
And these hats and rares that you keep mentioning, are also a completely seperate thing from the actual issue at hand.
Just adding more GP changes nothing in terms of these items' value or anyone's ability to purchase these.
Imagine going from 3,5billion total GP, to for example 5Billion total GP inside the game, this also will have no direct relation on anyones actual buying power when it comes to these items, since the number of these rares is finite, and as long as new players join the game and what not, demand for them can only go up, increasing their value over time (Assuming that everyone doesn't suddenly decide to no longer want these items)
So if you simply add more GP to everyone's pockets (which is what we do every day), the prices of the hats will simply adjust accordingly. Their actual value will remain largely unchained in relation to gold pieces, the only difference will be the amount of gold pieces you pay for them.
Whether there's 2Billion GP available or 20Billion available makes no real difference on the actual value of these items. In the first scenario a Hat is simply priced at 50million and the other 500million gold pieces, but the 50million in the first scenario is worth the same as the 500million in the other, just to give you the rough idea here.
It's a similar situation to the pre-2005 Turkish Lira, where everyone were walking around with millions of Lira in their pockets.
Woah! millions of moneys for everyone?! But ofcourse, it didn't actually mean they were any richer than before the inflation, when all it meant was that a loaf of bread was 50k Lira now instead of 5. You see?
Piling up more GP doesn't change anything in terms of the relationship between GP and Items in terms of actual value and the actual buying power of the players, when it comes to trading with other players -it does however come with various negative side effects that are worth avoiding
All adding more new GP really does, is reduce the value of every other GP already in existence, while also skewing the pre-set shops prices, the value of skills like high alching and Thieving, and just generally exceeding design specifications and intentions.
And let's not forget, when was the last time you bothered picking up gold from under a mob you had just killed that wasn't a KBD? Soon the KBD drops won't be worth the right-click either. (already isn't for many, and i don't just mean the Rothschilds of this game, but just regular players)
And this will only get worse over time, much worse, so we may aswell put in place some automated system now that keeps the economy healthy, and won't require continually having to manually adjust the drop rates and all the mobs in the game, the return on skills, the shops prices, etc, and since the Auction House does provide a valuable service, it seems only fitting to place the solution here, at the center of trade. (Gee, like every other game does)
I think we should be all thankful that you don't teach economics irl. LOL'd
silly girl, we need to worry about gold sinks when there's more gold in the game than resources. At the moment there is more item resources that tie up gold, so therefor we don't need gold sinks.
Also there is a gold sink of purchasing the right half of the dragon shield from legends, thats 750k.