Buying privilege is a fact of life be it for yourself or your children. Where you live, the house you live in, how you travel to work, what tickets you buy on a train or hopping on a flight. What car you buy, what shops you spend your money in and what you buy, how you eat, what you eat.
In this case, the government has admitted the system is broken and relies on private education providers. Why should parents who can afford to bite into their budgets not be able to pay for a basic right to good education and care for their children when the state cannot provide better?