Defending capitalism explicitly on moral grounds is well and good but in my experience it is more effective to say that capitalism is not essentially an economics phenomenon at all. It takes place in the context of producing, exchanging and using goods and services but that doesn’t make it essentially economics any more than the question of whether you ought to go to BED with the flu is essentially a question about furniture. No, it’s essentially about your health. And capitalism is essentially about how we live together, get along, and treat other people in a certain area of human affairs, namely, producing, exchanging and using goods and services.