IIRC Arizona does not allow any food that is prepared and sold to be purchased with a SNAP card. You could go to Papa Murphy's and buy a pizza because it's not cooked on premise, but you can't got to Papa John's and buy one. The only work around is if you were to go to Albertson's you can't get a rotisserie chicken in the deli, but you can once they put it in the cold case as a marked down. Same if you went to a convenience store, you can't get the hot dog off the roller, but you can get a cold prepackaged sandwich.
If you walk into an Arizona convenience store with your EBT card, you can purchase whatever you want, as long as the clerk is willing to sell it to you. Same with underage folks buying beer, the only difference is that there is a much higher chance that you will get caught selling beer to a minor than selling a hot burrito to a mother with her two kids.
It is in the best interest of the police to enforce drug and alcohol laws because their success is measured by their ability to reduce such crime. However, for the USDA/FNS, the more money that flows through the SNAP program, the more money they receive. For the retailer, accepting SNAP/EBT for unqualified items is as attractive as it is to the USDA/FNS to ignore it. Both groups benefit. It falls on law enforcement to catch fraudulent SNAP and EBT transactions through physical stings, and because it is considered a victimless crime, enforcement is not a very high priority.