People have been cheating, lying and stealing from time immemorial and we can expect them to continue until the end of times.
Thus, the job of an ethics & compliance professional is not to eradicate these behaviors. It is to create a culture where they are not welcome.
Since culture is an outcome of our processes, our job is to remove from our processes any tolerance for cheating, lying and stealing. People engaging in these behaviors do not get hired, promoted or otherwise rewarded. Our processes either gets them fired or leads them to leave on their own.