It’s important to remember that businessmen strive to please the guy who is paying them money. Under a voucher scheme, the school’s primary customer becomes the government, since the school will lose alot of business if it is cast off the government’s list of voucher-eligible schools. Just as the federal govenremnt controls the state drinking age via the threat of withholding highway funds, the curricula and offered programs of these independent schools would come under increasing government control. In the meantime, schools that reject the program will be at a competitive disadvantage over schools that participate, and so most schools will choose to participate rather than go bankrupt.