[riffraff]

It seems it should be trivial to solve the differentiation problem too.

When I was a kid in Italy in the '90s we paid for lunch in middle school, but this was done through "lunch tickets".

You'd get those from the town hall, some of us paid for them, some got them for free, but you would not know about it when getting lunch.

(Still, free lunch for all kids should obviously be the default)