Comment by delichon

  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. Nobody but a beggar chuses to depend chiefly upon the benevolence of his fellow-citizens. -- Adam Smith

Care doesn't scale but self-interest scales efficiently. The baker who gets up at 3 am generally does so because she cares about her close circle of loved ones, far more than the world at large. In this sense care and self interest are not in tension but amplify by constructive interference.