Gee, do you think it might have to do with the fact that these parents then have to drive the kids to school so that they can get this free breakfast? So in fact, it isnt free now is it!
Cost of gas, time of parent, choice? Cheaper to feed the child at home.
A few days ago I made a rare early morning run for supplies before the rush hour. This was 6:30 AM and still dark. The streets were flooded with school buses picking up kids from middle class neighborhoods to take to school so they could eat for free.