8. The voucher idea has attracted a spectrum of proponents that runs from the conservative economist Milton Friedman to liberal writer Christopher S. Jencks. Friedman’s proposal was a simple one: Governments would continue to administer some schools but parents who chose to send their children to other schools would be paid a sum equal to the estimated cost of educating a child in a government school, provided that at least this sum was spent on education in an
approved school.