Perhaps, but that would be in the minority of cases.  Too many people having kids just for the sake of having kids - "I want a baby, they're cute!  My friend's baby is precious!"  "I want a little girl so I can have a friend."  "Little Bubba 'needs' a brother - we tried, but had two girls, so we're trying again for another boy ...." "All our friends have kids ..."

I have no problem with my taxes paying for the basic infrastructure of schools and the salaries (and benefits) of teachers, but I also have no problems with parents chipping in more to pay for their spawn.  The more you have, the more you pay.