It's nonsense. Even the poorest has a dishwasher. The question is just supposition. What would they do without dishwasher.. I have a dishwasher and I would probably just wash my stuff because buying paper plates, putting them in the garbage is the same effort. Plus I like something more than pizza. How a paper dish works with grilled meat grilled cheese, a soup.   No no 

 Even the poorest have a dishwasher? o.O?

That's really interesting, you don't see that here in Ireland, people will wash most of their dishes in the kitchen sink by hand to save money if they are hard up. 

 The cost of utilities in the US is way way less than in Europe. It the US the biggest expense is housing. If you go live in the US with a low income European you get rich quite soon.