The school voucher is the means of putting the power back into the hands of the consumer. Companies are forced to continually improve themselves in order to retain their costumers. For example, if a consumer does not like the service they received at a restaurant they can choose whether to ever return to the restaurant. If the restaurant is beginning to loose a substantial number of costumers they will have to make some improvement or go out of business.
Vouchers will give parents the ability to choose forcing schools that are not performing up to par to improve or close down.