If money makes no difference to educational outcomes then why do the rich send all their kids to those elite prep schools that cost so much money?
Here in indianapolis, it costs much less to educate students in private schools than in public schools. Of course, the parents who send their children to these schools pay the property tax and the private school tuition.
Private school cost per student is lower, test results and graduation rates higher.
Perhaps it would be a good idea to emulate the private school models in the public school system.