So the kids get both breakfast and lunch at school--provided they have the cash? What about supper? It would make for a lot less dirty dishes at home.
You kid, but a lot of schools have 'Latch-key' after-school programs which DO serve food, not a full meal though.
Just FWIW, my kids' school here in the backward Red State Hell For Libs that is the MO Ozarks would keep serving them food when the accounts ran dry, they'd just send reminders to the parents to cough up. Even if they were totally delinquent on paying, they'd still give them PBJs.