Someone I know holds the opinion that those higher up the class/affluence ladder don't tend to consume basic carbs. Basically he thinks it's all expensive protein and veg only. He is referring to the upper classes not the middle.
I strongly disagree, as in my own experience this simply isn't so. I am neatly in the middle/middle income and have witnessed people enjoying buttery mash, pasta and white bread from all walks of life.
I know that carbs are often cheap and plentiful and have bolstered generations of people through struggle and hunger for centuries, but I still believe they are an essential nutrient that no one excludes unless managing a health condition or dieting.
For example, my work brings me into contact with a broad range of people, and bangers & mash, flatbreads, pizza, seasoned potatoes and fancy white bread feature on plenty high end plates up and down the country, including boarding school menu's, etc.
My own impression is that the 'quality' shoots higher, diets are more diverse and portions are smaller, but the carbs are still most definitely there.