But doesn't your assertion support his argument? If unhealthy items are cheaper than healthy ones, then unrestricted food stamps will not work as intended. You

But doesn't your assertion support his argument? If unhealthy items are cheaper than healthy ones, then unrestricted food stamps will not work as intended. You must restrict them to only healthy items because unhealthy items are cheaper. (Massive caveat: Big disagreements between people over what is healthy. But there is less disagreement over what things, e.g. soda, are unhealthy.)