Can you please back up your bold statement that the system attracts personalities driven by their own ambition with some data or evidence?
I'm intimate with a number of prosecutors (including my partner), and I've not once come across a prosecutor who possesses such attributes of character. It's quite the opposite actually - most turn away higher paying law firm jobs to do what they believe is community service.
To me this injustice has occured on behalf of corrections facilities management. Very sad.