That's usually because the 'husband' and 'wifey' are living together but not reporting his income. Seen it time and again, the couple doesn't marry just so the mother can continue getting assistance. Every noticed how many younger couples with kids are now perpetually engaged or use the term 'wifey' and other code terms for one another which means they technically aren't married, just playing house on tax dollars and the guy's unreported income. I would say this is the biggest kind of fraud going on right now in this arena.
Every single person on food stamps needs to be visited by the people who dole out this free food. To make it viable, they should be visited every once in a while at about 3 o'clock in the frikkin morning. If you're not in bed by yourself, and it looks like the spouse has moved in, you lose your ticket for a free ride!