Mordorandor
Villager
Not the way I see it. 1 gold = 1 XP. It's just that you don't find much gold lying around in unchallenging places. Dragons DO guard their hoard, and if they don't guard it personally 100% of the time, they make sure there are other effective intrusion and theft countermeasures they can rely upon. No party of beginners will blindly stumble upon an unguarded dragonhoard just waiting to be hauled off.
Agreed.
I use the ratio approach to adjust. 10 party levels against 10 HD monster, 1=1. 20 kobolds against one 10th level Wizard, 1=1. 20 party levels against one 5 HD monster, 25% of XP value, based on the 1=1. They might find 10,000 gp on that line 5 HD monster, yet the XP would be 2,500 if they get it out of the dungeon.