Oh man, this is so bad - I admit that I read the headline the same way, and then started thinking "Hmm, maybe there's an argument there." Both communities really help you develop important life skills, and you get the opportunity to network with people who are better than you at certain things, or have great "business" contacts, and may be able to help you find a job later when you get out.
You'll likely learn a great deal at either place, and we could indeed debate the merits of lessons learned at each place. But the body of knowledge learned at each is so different - there's so little overlap. Minus the social stigma, being processed through both institutions likely results in a very rounded worldly education. Knowing that some individuals have indeed done this, what is their perspective?
Classic example of ignoring the std deviation and using mean instead of median as if it holds any significance given a very unusual distribution curve. Its truly a textbook example.
Selectivity in lower socioeconomic class jobs is hardly limited to great paying jobs; there are similar stories about McDonalds being more selective in hiring than the Harvard acceptance rate.
There's also a cause/effect malfunction in that kids going to Harvard is an effect of getting rich, but getting rich is an effect of being a prison guard in CA, two entirely different concepts.