This review is a bit lazy in my opinion.
The writer wasn’t trying to get into the nuances of the overall economic system but set up a simple framework of what happens to a wealthy family during an economic collapse. How the a family felt entitled to wealth only to not have it and the actions they needed to take to survive. The personal relationships the resentment people have when it comes to wealth.
It’s a good book the focus wasn’t on government and economic systems but on a family dealing with a crisis around them.