My wife made the perfect comment: "That's the Americans' American Dream." She is a naturalized citizen from Mexico. Her point was that new immigrants have a much more modest (and attainable) American dream. In the eyes of a new immigrant, born and raised Americans have outsized expectations for life from a material perspective. I agree and I think that is sort of the point of mustachianism.
That is one thing I love about my job as an attorney for immigrants, they are usually much more grounded and keep me grounded as well.