That makes no sense. Self interest is why it works.
Adam smith said it succinctly: "It is not from the benevolence of the butcher the brewer, or the baker that we expect our dinner, but from their regard to their own interest. We address ourselves, not to their humanity, but to their self-love, and never talk to them of our own necessities, but of their advantages."
As for "maximising the number of smiles" and "strive to feel better, not to have more", there is research that suggests that the way to do that is to become richer:
Adam smith said it succinctly: "It is not from the benevolence of the butcher the brewer, or the baker that we expect our dinner, but from their regard to their own interest. We address ourselves, not to their humanity, but to their self-love, and never talk to them of our own necessities, but of their advantages."
http://www.classicreader.com/book/770/3/
As for "maximising the number of smiles" and "strive to feel better, not to have more", there is research that suggests that the way to do that is to become richer:
http://www.brookings.edu/research/papers/2013/04/subjective-...