The scumbag Jarl of Whiterun has a scumbag court wizard who knows how to enchant his scumbag weapons and armor. The wizard probably sits there all day, enchanting $#!^ just for the hell of it. So what do you get when you return for your reward? A set of armor? A whole armory of enchanted weapons?
How about one pair of boots? Or maybe an axe? You like axes right?
The point is the scumbag Jarl gives you one item while his armory doors won't even close because of all his swag.
