From the top of my head real world has things such as inflation, interest rates, monetary policy.
If you consider interplayer trading then widely accepted laws of demand and supply are visible as the number of players and items in the game keeps increasing and increasing. I remember the prices for stat pots were around 1.5-2K platinum were only 6 month ago or so, compare it to now: someone was offering them for 0.5K couple of days back.
Cf shops operate on the idea of restricted supply(shops do reset only every 2 hours, first come first served basis, and if the item you are looking for is not there you can't bid up the price and get it, you simply have to wait, of course here comes interplayer trading) and constant prices(yes..some shops offer cheaper items, and there is bargaining, but overall this holds), this in no way approximates the economy of western countries of today.
At some point in time you reach the stage when money become irrelevant as there is simply nothing to spend them on because there is hardly any consumption of anything but food.
A possible fix to this would be to introduce 'durability' of items, items should wear off with time, this would hurt seriously the supply side. Durability can either steadily decrease over the items lifetime (overall time the item can be equipped) or it can decrease on a random basis.
Imagine a shield that gives you +30 arm, it does protect you against 30% of the physical damage you would otherwise incur, it would make sense to have a roll, which, if successful would damage the shield (decrease its durability) until the point when this shield can no longer protect you as it turns into a pile of garbage.
A much less painful way, but also a less affective way, would be to introduce the ability to repair your own equipment, here comes in play smithery and the like. But to have any degree of sucess repairs must use up some components or there should be a restriction on the number of times the item can be repared.
Overall current cf world with unlimited money supply and more or less constant prices in no way reflects real life, but do we all think it has to
Also, there is an additional currency in cf, it is respect/knowledge of the game/information/status, call it anything you like. It can be successfully traded for items/money and the other way round. If you take this into account the economy is not that broken.
