I understand the impetus behind this however I must warn you of the flak you are about to receive by haters of the Editors Guild that lives deep in StackOverflow. I am talking about the 3 or 4 users who have itchy "edit" button fingers who wrack up dozens of "edited by ..." credits within minutes of a post by changing tiny things.
These people are necessary as they keep posts fairly clean. Their rewards are intrinsic and they do not require more motivation. Its a minor miracle that they haven't been banned outright because of their over zealous meddling.