Cindy: Kids do chores if they want to eat

In her Front Porch column, Cindy Hval writes:

The friendly bagger shook open my reusable bags on Saturday, and eyed the flood of goods making its way down the conveyer belt toward him.

“How heavy should I make these bags?” he asked.

“Load ’em up,” I replied. “I’ve got kids at home to bring them in.”

The cashier paused her scanning. “Your kids help you unload the groceries?” she asked, wide-eyed.

“Only if they want to eat,” I replied.

Her surprise baffled me. More here.

Question: Did you make your kids to chores?