My sister was a HS teacher btw, and I worked at a different HS as security. The school Cafeteria made food for 17 schools in total, and had 2 delivery trucks. Only the 2 managers were staff on the school board payroll, and they used contract labor for the rest of the workers, I rode bus with several of them.
The gossip was that the people who paid for their meals covered the costs to produce all the food, and the Fed money got shuffled elsewhere.
Note: My sister was firmly convinced that all the kids would go hungry. I'm pretty sure while some of them would, most parents would feed their kids, but hey if the government provides why not... Her school was the furthest south in Orange County, Florida, and went from predominantly white to predominantly Hispanic.