Very true. And don't forget that everyone is entitled to a public "education". --Including kids who are vegetables and have to have someone watching them all the time.
Editing to add more detail:
Based on my reading, they're spending more then $300 million on special education, around 25% of their budget.
$62 million goes to the university $46 million goes to the public libraries ~$100 goes to early education and ESL initiatives.
Those are all expenses private schools never have to worry about.