Neither side has been willing to change, or even talk about, the shift of wealth that has left most people barely able to get by. Working people get less and less reward for their efforts and the difference all goes to the owners. I think that is at least one aspect of Bernie’s complaint about the Democrats.
I don’t think it is generally considered a good book, but I’m sure it depends on who you ask. I thought it had some interesting ideas, but was pretty weak overall.