It's funny how they think it's a problem of educating students about what isn't considered acceptable behavior. The students knew what they were doing, they just compared the probability of getting caught with the reward and made a decision.
Given the high value that many desirable career paths (e.g. consulting, finance, academia) place on a good GPA, and the low probability of getting caught, the risk/reward tradeoff from cheating is naturally going to tempt people to make the unscrupulous choice.