Walmart are in the UK and known as Asda. They are considered second rate as they are scruffier and carry lots of cheaper brands and loads of fast foot and not enough stock so that those of us that still cook can buy the ingredients. Sadly they have never including anything to do with quilting. But we can buy loads of cheap clothing that has been made for virtually nothing in the third world.
Sadly, food prices are going up all over the world. You are very lucky in the USA that your food, gas and other utilities are much cheaper than they are elsewhere. It is almost worth flying over to you with several empty suitcases to stock up. Consider..... there are approx 1.78 $ to the £. Someone in this thread stated they pay $3 for a gallon of milk. The cheapest I can find that amount anywhere here is £3 a gallon. Our gas is about 2.4 times more per litre than yours. As for electricity and heating - don't ask. it would scare you.
I understand why you are groaning, but I guess the whole world is groaning too. One newspaper report stated recently that in the UK we expect our food bill to be 10% of our income nowadays, yet only 20 years ago it was 20% of our income. Food is cheaper today than it ever has been, it is just that the numbers have gone up!