That's how class divides have historically worked, yes. Previously those differences were also enforced through explicit class-based laws (the actually meaning

That's how class divides have historically worked, yes. Previously those differences were also enforced through explicit class-based laws (the actually meaning of privilege). The introduction of free markets, and later IQ testing, disrupted a great deal of the entrenched social class structure within western societies and allowed many people of rather humble backgrounds to achieve great things. The concern I express is about whether IQ testing will continue provide the same level of social mobility in the future.