I'm still making my way through the book. One of the things I found fascinating is the language around debt, and how it's so bound up in morality. Money/credit/debt is an inherently social construct, so it makes sense that getting people to pay up becomes a social construct as well. Since we tend to make social constructs out of the things we have around the house, it makes sense that a lot of it is tied up in religion and/or morality.