What if there were no player to player trading transactions. Take off the trade button so that I cannot sell that "godly" Sundering Stuper Blade of Fortitude to "Joe Mumma" for 100k and 150 ectos. There's another thing. Ectos being used as the currency for high end transactions. I'll get to those later.
As for not trading anything. Imagine with me for a second here, how that would completely stop ebayers, gold farmers, etc from trading their gold for real cash. There would be no way for them to trade it! AHa you say! " But they could go into an instance and "drop" the gold to the purchaser for him to pick it up after he made his purchase at WacOnald'sgold.com!" Why should A-net allow it for us to drop our gold in the first place? Why in the blue hell would I want to drop all 100k of my loot OR even 1g for that matter on the ground? I wouldn't do that with my real money unless I was doing something illegal like buying crack! Or so I hear that's how they do it lol!
Ok, so far we have
1. No trade between characters
2. No ability to drop your gold coins
Now let's talk about why A-net even felt we had a need for a storage capacity of 1,000,000 gold coins in my storage and my ability to carry 100,000 gold coins or actually 100 platinum bars on my character. Obviously they were expecting to have Rich and poor people in the Economy? Why not average people and "wealthy" people. My view of wealthy is a medium between average and rich.
Let's make a quick cheap table to better understand:
Poor people
Average people
Wealthy People
Rich people
A-net can simply put it to where there is no rich category in GW. The game shouldn't be centered on an economy. Sure there will be those that say "It isn't centered around an economy, you just think it is". Well, I'm not saying it is, I'm saying it shouldn't be.
Ok, let's get to my point on this topic already, before a Mod get bored and closes this thread lol

My point is, why not make the storage capacity cap out at 100k, and cap the amount a character can carry to 10k? I'll go ahead and explain my next economic issue to help you understand why I have this as an idea.
Cap the amount that any material can be worth. Let's take a quick look at ectos in our current economy. They are running at about 10k right now. I've seen them get up to about 14k. I've seen them as low as 5k. I see every other rare material at half the price of ectos. Most are at a 1/10th the amount of ectos. Here's my catch: Why not cap rare materials at 3k? Or less, something more reasonable than a limitless value on stuff that eventually makes for a better means of currency then currency(gold) itself. I don't go to the Mercedes-Benz dealership with a handful of diamonds to purchase a vehicle. Diamonds aren't the currency in RL, why should ectos be? You feel me?
Ok, so far we have
1. No trade between characters
2. No ability to drop your gold coins
3. Smaller cap on gold carrying
4. Cap on material value
Lastly is the Auction House, im going to make this quick. IMPLEMENT the freaking AH already! This will be our only means of selling our items and what not, so come up with an AH that will require the smallest amount of time needed to keep up with the trades. Have a cap on the amount that you want to sell your item. What should the cap be? Let me guess, 10k! Because that is all that your characters will be able to carry! Duh!

Your bidding auction is your standard "highest bidder at the end of the auction wins" thing.
The Set Price auction will be where you have a price you want to sell an item and the first one to accept that price and purchase it takes it.
You can always come and check to see if your item sold or not. Less hassle. More playtime!
Anyways, that is my view on what would be a new improved economy for a new improved GW.

Thank you for your time!