While I do not fully understand the details of school finance, especially weighted enrollment, It is my understanding that the state pays X dollars for every non special education student in the state. Additional funds necessary to run each school are paid from local mill levies. That is to say, that my kids school does not cost you any more than your kid costs me. We keep our schools alive by increased local mill levies and as long as we can and decide to do so, it doesn't really hurt anyone else.
Respectfully Submitted,
Fletch F. Fletch
Cost Study Analysis - Estimating the Costs of K-12 Education Fletch F. Fletch:
Perhaps the above link to a PDF document will answer your questions.