It's really more helpful to look at "middle class or better." Because yes, the middle class has shrunk. But more of that share went to the UPPER income tiers.
The middle class went from 61% in 1971 to 51% in 2023. But the lower income brackets saw a +3% change while upper saw +8%.
https://www.seattletimes.com/business/economy/the-incredible...
>The ones on top getting a lot of the resources while the rest have to fight for whatever is left.
There simply is not a static pool of resources.
Economists and rich people indeed think in terms of scarce resources. Any economics book will tell you that it is about managing scarce resources. Rich people will never allow for example the government to give increasingly more money and resources to lower income people, because they fear there's note enough for them. They don't believe in abundance for everyone.
Static, no.
Elaborate? Scarcity means demand for the resources exceeds the available supply. There is essentially unlimited human wants and only finite resources. The resource quantity can grow but it will never meet demand. Even if all growth goes to the people with less resources, the resources will still be scarce.