About 4,000 people in America die every year while waiting for kidney transplants. More than 95,000 currently need regular dialysis to stay alive while waiting for transplants. The average person who needs a kidney must endure the discomfort and restrictions of dialysis for three to five years during the wait.
Most countries have organ-donation systems like America's—and long waitlists. Iran, by contrast, legalized payment to kidney donors in 1988; within 11 years the country eliminated its waitlist. Payment compensates donors for their time, pain, and risk; it also increases the supply of willing donors.