I'd say that and and the global propoganda machine is strong. There's many from outside the country who have a picture of what it's like to live here that doesn't align with reality. I think much of it is due to entertainment: movies, TV shows, etc. that give this false impression that everything is rosey all the time.

The lower classes are abused here as well and classes do exist but it's probably better being poor in the US than being poor in most parts of the world. If nothing else you have access to emergency rooms and food, although you may not have real housing.