For me, the moral of the story is never do anything for others. Just do it for yourself! In a free market, the actions of a selfish entrepreneur benefits society. A truely selfish human who thinks of his long term future and works towards it with integrity and hinesty, is a net positive to society. A "selfless" person who does what he is told, the teachers pet, is ultimetly, a net negative.
This might be the argument of Adam smith from wealth of nations..
