The Adversarial Trial

Chapter 11 in your text defines the role of each 'player' in the trial, from the prosecutor to police to defense to witnesses. The appendix to Chapter 11 specifically addresses plea bargaining, or pleading to a lesser charge in exchange for a shorter sentence/lower fine/etc. How has the justice system in our Country evolved in light of plea bargains, and do all cases get the proper attention they deserve? Does the system truly serve the public and do all persons who 'should' go to jail really end up serving the appropriate amount of time in jail ? If not, what are the reasons why?