If you already have a job and know what is/or forms part of a trade union, then you know, in both theory and practice, a lot more of what this academics are trying to theorize.
Also, this book is anti-stalinist and, with no surprise, glorifies the pathethic zapatistas movement. I assure you that without them, my country would've a lot better, and this authors don't know a thing of what they are talking about.