Of course, for the most part they're similar. What the article alludes to is the stratification of social classes. There are the wealthy rich, the professional

Of course, for the most part they're similar. What the article alludes to is the stratification of social classes. There are the wealthy rich, the professionals, and the working class (Of course there are more​ classes and this is a simplification). Children of the elites tend to stay elite, children of professionals are professionals, and so on. Regardless, vast majority of the people have to work to maintain their lifestyle. It's hard to feel that you made it if not working makes you lose your position.