Earlier this month, I visited a hilly corner of North Carolina to spend time with family friends. As we sat around the kitchen table, a former musician whom I shall call Dave revealed that he had recently started an entrepreneurial sideline to supplement his meagre family income. During part of the week, he works in a local pawnshop but he does not lend out cash. Instead, Dave fills out application forms for people who want to buy firearms — but cannot read or write. He only charges a few dollars for this but the service is so popular that it provides a steady income. “Lots of people round here can’t read and write,” Dave told me with a rueful laugh. “But they all want guns. So they pay me to do that — I use their driving licences to get all the details.”