That does raise an interesting point.
Hypothetically, let say there are 10 towns. At 5g a day for Town taxes that is 50gold. That 50g, instead of disappearing in the Void, is divided up into 5 vendor Npc's in Mavenholm. For that day, people could travel to Mavenholm and click on the NPC. The NPC would tell them what he is buying today. (i'm pretty sure there are programmable quest givers and these could be modified to become the Vendors.)
"Hello, stranger. My shop is running low on Paper. I will pay you 2 gold for 1 stack of paper."
Player returns to the Vendor and receives his reward. If all the Taxable money has been given out, for that day.
"Ah, I am in no need of any wares today."
The money could roll over if noone completes the tasks. This will increase Traffic to Mavenholm, actually encourage people to compete for the gold. At the same time creating a hub for Rp, recruiting and trade.
I could easily come up with the different variable and things he would say and require.
It would also keep the mined gold in circulation.
These two come to mind.
http://www.youtube.com/watch?v=__P_cQEFuq4
http://www.youtube.com/watch?v=DeAg2mnEDDY