aldi grocery store

I like to shop at Aldi for this reason and several others: they don't give you bags, you either have to buy theirs or bring your own OR reuse the packaging boxes that their food comes in (available at checkout), you have to use a quarter to get a cart (incentive to bring it back and reclaim your quarter), and it's small-- no wasted space on advertising or cosmetics. Just food.
And so the food is economically priced. It's nice to see HOW they save money. As opposed to Wal-Mart, where prices are slashed, but I wonder at what cost to their employees, providers and quality of products?