The financial incentives are way too high for that. There just aren't that many martyrs in the system. Well, first there are the ugly economics - any taxpayer with children is already forced to pay for our existing educational entitlement system. Opting for a private or homeschooling alternative means paying double - something many parents can not afford. More important than the economics however, is the way the system encourages parents to abdicate responsibility for their children's education.
Traditional welfare encourages dependency on the state.
You don't have to do a thing for yourself. The same message is delivered to parents with educational welfare. This huge assumption of authority in the educational lives of our children makes it easier for many parents to relinquish responsibility for their children's education to the state. They trustingly send their children off to school day after day, year after year. They believe report cards accurately reflect a child's achievements and abilities.