Alice Rawsthorn on design for the unwealthiest 90 percent

The numbers seem nutty. There are 6.5 billion people on this planet, 90 percent of whom can't afford basic products and services. Half of them, nearly three billion people, don't have regular access to food, shelter or clean water. Yet whenever we think, or talk, about design, it's invariably about something that's intended to be sold to one of the privileged minority - the richest 10 percent.