Well, if parents use a voucher program to take their child out of a public school and place him into a private school, then that public school would no longer need to spend any money to teach that particular child. The amount of money per student that the public school receives would remain the same. The total amount of money that the public school receives would be less, but the total number of students attending that public school would also be less due to the voucher program.
I'm just getting around to reading this thread....
You know, I've never understood why the pro-public ed types scream about the public schools losing money if we start using vouchers. What you said is so obvious that I don't know why people buy the argument (or use the argument) that the schools will lose money. Fewer students--less money needed. Duh.