Back when the foodstamps were paper, users could trade them - 2 for a dollar - to the dealers. (Don't ask me how I know that.) Now that they are in credit card form, it may be a little more difficult - but I'm sure it can be done.
My daughter and I were behind a lady in the grocery line yesterday who paid with a foodstamp card. She was loading groceries in a Jaguar when we walked out. I kid you not. If we must keep "welfare" - then I'm all for the drug testing.
This was not necessarily a food stamp benefit. In certain states, the "EBT" card is used to distribute various kinds of payments for services, such as foster care and guardianship.