I was just in Sweden and went grocery shopping. There were no cashiers at the check out. You picked up a bar scanner when you entered and scanned all your own groceries. The bar scanner provided a total and you paid via automatic checkout. They had one person checking receipts. I asked how this did not contribute to "leakage" (theft due to unscanned items). The person responded that leakage could double and it was still cost effective not to have cashiers. That is what $15 minimum wage will mean to retailing. Enjoy.