Unfavourable outcome? Death. Alternative? Act in your own self interest.
It can be acting in one's own selfish self-interest to steal. If a society tolerates this (thus tolerating the violation of the Golden Rule), what becomes of that society? Since the individual is also part of the society, what then happens to that individual? Is it now in his "self-interest" act in ways that damage the society that will sustain him and his progeny?