There is simply no need for it. The game is amost perfectly balanced to your own level if you follow the "right" path. You will always fight against mobs that are on the same level as you or one level different at the maximum...

Apparently I'm playing the game wrong, then. 1) I keep facing groups of enemies that are twice my level (they're 6 while I'm 3), and it's quite difficult to avoid getting squished to oblivion. 2) I can't afford skills unless I go on a looting spree, stealing paintings from every wall in town.
I wish the city had an area where I could repeatedly face off against other random individuals or teams. Win gold and experience (no items) if I win. Suffer the usual shame and durability loss if I lose. It'd be a great way to slowly train up and legitimately earn cash.