To clarify: anything you can do just as well yourself will save an enormous amount of money. But in a highly specialized society, different people do different

To clarify: anything you can do just as well yourself will save an enormous amount of money. But in a highly specialized society, different people do different things very well -- sometimes orders of magnitude better. Paying some guys to replace my windows is much more efficient than trying to do it myself. (I'm presently a stay-at-home dad. Not only can I do it just as well as others, but the marginal benefit of a second income is much less than the marginal benefit of being able to take care of my child and my house exactly how I want to, and the enjoyment I get from those things.)