I personally shop in Lidl, not Aldi, but Lidl is often compared to Aldi, about as popular and occupies the same price segment. And I eat like a king from there! Excellent protected origin cheeses, meats, wines, organic products... Half the time I leave the Lidl I go with a shopping cart that would make an American foodie drool. My most recent purchase there included Manchego cheese from Spain (fantastic stuff!), French wine, Kalamata olives, Belgian beer, Belgian chocolate...
The Americans I've taken to the Lidl have all been impressed; they certainly did not say anything to the effect of it being 3rd world. Canadian supermarkets, on the other hand, I remember as having shockingly high prices (even after converting prices from Canadian peso) and far fewer fresh items than I was used to.
Furthermore, people with "regular jobs" in Germany generally live much richer lives than their American counterparts. Fancy/organic foods are far lower priced in Europe, 30€ with a low-cost airline will take you everywhere from the south of France to Spain or Italy, museums, music and events are cheaper, top universities are in reach for your children... And yes (gasp!) in many places you don't even need a car! I commute around 240km a day by train + a few minutes' bike :)