One (maybe interesting) approach would be to reset points and power every so often. Once or twice a year? For past achievements have them as a badge inside a pr

One (maybe interesting) approach would be to reset points and power every so often. Once or twice a year? For past achievements have them as a badge inside a profile of a user, not visible on the comments/answers section. That way, users would have to keep working at maintaining their power status. Not like it's now, grind to the status and act like a roman senator.