One day I'll figure out how to start something to change things because I'm as well aware that things aren't going well. On the other hand, you have to let things get bad in order to prove the point that this is the wrong way and then it's not only you who has a good idea for change. The New Deal, the foundation of previous American power, was one of the answers to the Great Depression, the other was totalitarianism in Europe, where rich guys bought themselves an ideology to protect their exploitations (the second KKK tried the same in the US, but collapsed from internal problems). That's why the Nazi "Bonzen"(derogative for very rich guys in German) failed in the end because their system was based a lot on bribery and not so much a conviction of creating achievements for the common good. Their conviction was rather a justification for personal entitlement to loot and bribes. It's not as bad now, but we're going down a similar road that creates a doublespeak in order to justify unfairness through manipulation.
I fully agree with you that a society is split into very many groups that each make their own contribution and that individuals can be part of many contributing groups. I'm not really sure how to get a holistic picture without some deletions for simplification and I'll have to read the complete book in order to be able to say more on the subject.
The whole story reminds me about the history of ancient Rome that I imagine to have grown great based on a backbone of wealthy, but not rich, swordfighters as heavy infantry while all people they subdued had more rich guys contributing cavalry and never a heavy infantry to match the Romans. These swordfighters were trained and nourished from childhood to excellence and showed this even in the Second Punic War by fighting their ways out of Hannibal's traps. The ongoing expansion of Rome changed this country by eroding the wealth of their former middle class heavy infantry and their ability to maintain their outstanding swordplay (good individual fighters that stil needed training as a unit) that demands lots of time to train and food to nourish the strength. So in my opinion, Rome grew so powerful it could cut her roots and base her power on something new, the professional legions with foreign aristocratic cavalry mercenaries, without faltering for several centuries. In the end, Germanic militias finished off this empire that had lost the trust and support of her inhabitants. I can similarly imagine the US shifting away from her former strengths towards a new system of world dominance because of the erosion of her old powerbase and I really don't like it.