At 41,525 dollars per person, I doubt those people are in the habit of being thrifty.
My grandmother died a few years ago in her late 80's. She had worked well into her 70's, had an 8th grade education and had worked for a salary other than the years she owned a dress shop in Wink, Texas. Her only spending came from buying a new car every four years, and taking a cruse every other year.
Every payday, for most of her life, she bought a share or two of Humble Oil stock, average price about $2.00 a share if you try to figure all the splits. When she died she left 15,000 shares of Exxon Stock, which has since split again.