Most kids have a very low bar for luxury, especially those that don't grow up wealthy. Our idea of "class" is generally based on whatever things are rare or off-limits to us, regardless of whether or not those things are actually expensive. For example when I was a kid, I thought anyone that had an ice-maker in the door of their fridge was basically a billionaire.
The tweet got an enormous response, and it turns out many of us can relate to lusting after such "luxury" items as Milano cookies and Jordache jeans. Did you know that you don't have to be in the 1% to afford Andes mint chocolates???