mamashtakah
Kids don’t have to go to school, they can be home educated. (Chabad shluchim among others do it) That makes school a luxury. I guess clothing, food, mortgage payments/rent, health insurance, cars and car insurance, electricity, water, gas, cell phones, cleaners and medicines are luxuries too. Or is it only camp? Everything is relative, what might be a luxury for some might be a necessity for others (and for the children themselves).