The author started by writing an article, and because it was fun to write and people liked it, he wrote the book. The amusement that the process took for him may explain why the book does so much of random quoting without context, and ultimately a sad lack of profundity. It's not that there is no insight at all, but it could have been much more.
My biggest lesson was probably in talking about welfare legislation, it is revealed that part of why it didn't work as intended was that the existing need was much greater than anticipated. That often led to anger from opposing parties, though that is not a helpful response.
And that is the thing that is missing most of all: good analysis of the opposing forces and their motivations, and the role that plays in difficulty moving forward.
The other thing that seems worth noting in the chapter on campaign finance reform was that while the loopholes had an educated public in mind, they were probably trying to solve the wrong problem anyway, as the high spending levels do not make anyone more educated.