This is my suspicion. I imagine, if you don't care about the majority of the population, you might as well reduce the economy to circular transactions between corporations and between 1%ers and the businesses catering to them.
Everyone loves to talk about neuromancer but missed when gibson went on to write a half dozen even more prescient books about exactly this process and its eventual consequences.
I propose we should care about the majority of the population, and not do that.
Circular Transactions mean something else and are orthogonal to this conversation.
That said, the reality is that the 70th percentile of household income nationally is a little over $130K [0] and the US is a country with a population of around 341 Million people.
Therefore, you can have a self-sustaining consumer market with around 100 Million Americans who are members of households earning above $130k a year - you would end up with a significantly larger TAM than targeting the bottom 70%.
Most skilled (SWE, Accounting, Law), semi-skilled (Automation Engineer, Mechanic), civil service (Police, Teachers, Local government employees, Military), and union employees all marry people within this strata and remain in that strata.
[0] - https://dqydj.com/household-income-percentile-calculator/