For me, the most important problem on the economy in gw2 is the gold sellers/bot and therefor might be hackers on looting accounts for it.
I wounder why no one came on the idea at arena net to solve this problem by stopping the gold-sending per mail.
This would make it almost impossible for the gold sellers to send their gold to their costumers oder to “loot” an account for gold.
In the next step it would make no more sense to bot and would limit that problem a bit too.
For friends it would be still possible to trade a bit gold over a guild vault/bank. However that could be abused by sellers, but it would be much harder as you need a guild per person you send gold, you need influence and so on. And you could overwatch guilds which just opend and research only the guildbank.
With no other option available to goldsending, it would linder the problem and almost not affect the majority of the players at all.
