In the developing world, most people don’t yet live in big well-run cities. Given the chance to move to one, hundreds of millions of people would go there to get a job, get an education for their children, and live in a place that is clean, safe, and healthy. Other people will make a profit by hiring them or supplying them with infrastructure and other services. If the rules let this happen, everyone can be better off. It doesn’t take any charity to build well-run cities.