Evil is rewarded with evil, and evil with evil, so it harms others and benefits others. On the surface, it seems to have temporary benefits for yourself. Actually, it's not good for you at all. It will only increase your sinful career and make yourself miserable in the future. Because of ignorance, people will do things that harm others and benefit themselves. A wise man will benefit others and benefit himself. In fact, benefiting others is self-interest, and harming others is harming yourself, because there are karma, right?