Grocery stores operate on very low profit margins already. Also, agriculture/husbandry and mass transport is heavily subsidized and regulated (in thr USA at lea

Grocery stores operate on very low profit margins already. Also, agriculture/husbandry and mass transport is heavily subsidized and regulated (in thr USA at least). It's a good suggestion, but I don't think cashiers are a major labor cost, and suspect the lessons to be gleaned from that industry will have limited predictive power.