The author is presenting/supporting two basic ideas: that there should be a universal guaranteed personal income (i.e. a stipend from the government for every person in the U.S. just for being alive) and a maximum allowable personal wealth (i.e. a cap on yearly income and/or net worth). Too much time is spent elaborating on what are fairly self-explanatory propositions and too little time on anything resembling analysis.
Who is the audience? It seems pretentious and silly to be citing Plato for issues of 21st century economics. Is the audience high school students? Then again, including extended passages from Rawls, Dworkin, Nozick, is pretty heavy stuff for 18 year-olds. Since the work is all summary and no real analysis, I can't believe it was intended for graduate students or professionals.
Basically, the book is a string of lengthy excerpts from other people's works. It reads like a graduate school term paper and really doesn't deliver anything other than a discussion of the obvious.