here are some quotes from Reb Milton Friedman on public vouchers that are also applicable Jewish education, I think. Keep in mind that it seems also to fit some of halachik principles that allows unrestricted competition between teachers (but in other industries where you are generally not allowed to hurt competition and inconvenience neighbors)
> Reform has to come through competition from the outside and the only way you can get competition is by making it possible for parents to have the ability to choose. … The amount of money spent per child adjusted for inflation has something like doubled or tripled over the last 20 years. …The key word is competition and the question is how can you get competition. Only by having the customer choosing.