What if groceries were paid for by taxes and you were assigned a store based on where you live?
How would you feel if access to grocery stores worked the same way as access to public schools? What if you could only get groceries from the store (great or not so great) in your designated or zoned area? Just like the service in public schools is free, the groceries would be free since tax dollars paid are used to supply the stores.
A family could buy groceries from private supermarkets in other areas but they would have to pay out of pocket and receive no tax credit. Check out the article by Donald J. Boudreaux professor of economics at George Mason University and a senior fellow at the Mercatus Center.