Not to get technical or anything but does altruism really exist. Humans do a lot of things voluntarily even though they get no material gain from it. Nice people do volunteer work because it makes them feel good, as it should, and that in itself has value. Now, if you lack values and morals, then volunteering your skills to help others wouldn't really give you anything to feel good about, which is why you don't see A-holes voluntarily doing this sort of thing.