> There’s not enough rich people with enough money/assets/wealth to actually make a difference
They could make a difference to some. Also consider the harm they do to the system through their politics. It's not just the wealth hoarding, it's the attacks on education and social safety nets.
I think in practice you want to take steps towards structural wealth equality. It's a problem when someone has their big ideas and step-functions a society into them. I have enough intellectual humility to admit that my conception of what policies and systems we need would most likely not work in practice. But changing a few things to be more socialist, measuring, then course correcting would be nice for once. Instead we get Capital and their purchased representation telling us what works and stepping towards what's good for them.
Also apologies but I won't read a 400 page book on your recommendation. But looking over the topics covered it seems to be about states that tried a command economy. To me a command economy is obviously foolish. How is a government, notorious a slow moving decision maker, going to replace the free market? As you said it's an organism. It's complicated with millions of actions happening in parallel. I want incentives to be changed - ideally with as few changes as possible.