All the tags have the price per ounce, or pricer per each. They provide you with this information and you make the purchase or not. I would never assume a larger size is the better deal.

Right now at my grocery store, I can by two six pack Coors bottles (regular price) for less that a 12 pack. (woot!)

It happens everywhere. Not just Wal-mart.

No one is ripping you off or forcing you to be gouged.

People need to take more responsibility for what they are putting in their own carts. If they are so concerned about saving money, they need to pay attention more.