Ding! Ding! Ding! I'd also add; more kids = more tax. I don't think it's fair for you to pay the same amount to send your 6 kids through the system as the person who sends their 1 child through. You fuck more. You pay more.
I know the argument is, 'well the kids are our future [leaders]!' Every kid in the public school system isn't being groomed for the Presidency. Those that have the means to be better educated, will be the ones who make it to the top, and that's exactly who I'd want there anyways.
I'm still a huge believer that if you can't afford to have it, THEN DON'T HAVE IT!!! I don't feel it's every other person in society's place to pay for your kid in any way. I for one would NEVER have a kid unless I could pay for a private education.