It's not mentors or sprouts, it's the way the system runs in it's current state. Little incentive with little reward. No strict requirements leads to very little effort. No real moderation of the system from the start, leads to poor performance for both mentor and sprouts. Nothing to weed out the "I could care less" mentors, or the sprouts that are just there to cause havoc and hardship for mentors. No real overseer of what goes on within the program. It's all broken and needed to be fixed from the day it was introduced.