[allegedganon]

It is indeed very american-centric while presenting itself a number of times as applicable everywhere. I don't think it is: for example, I don't think many western European would be able to sort themselves into any of his categories.

[secabeen]

It's clearly focused on American ladders. I would expect that other countries/societies would have different L/G/E ladders, but most would connect at his E1 level. (For example, in China, E2 would actually consist of people with generational connections to the party, rather than generational connections to money.)