The book presumes a level of cynicism with the government and level of sickness with bureaucracy - but I seriously can't imagine any demographic that doesn't have that. Besides that I can see the book appealing to all, right or left.
The book (and accompanying website) had me crying with laughter and - like with all comedy gigs - it's hard to explain what was funny afterwards or to remember the jokes. I wish I could :)
www.socialscrutiny.org will give you an idea of the type of stuff in this book :)