Ask a borrower at the time of borrowing, “How do you plan to pay it back?” and you usually get cursory answers such as “Well, I get paid in a week.” Probe a bit—“But don’t you have other expenses?”—and you encounter exasperation, as if you just don’t get it. “Don’t you understand? I’ve got to make my rent payment this month!” The subtext being “I’m focusing on what needs to get done now!”

