Grand theory, but as with so many collective undertakings, there is insufficient public interest to adequately discharge the obligation implied by that "prerogative of all".  

People tend to mind their own business, and the path of least resistance involves abandoning criminal justice to the a criminal justice environment where it is quite evidently about the criminals, the lawyers, the judges, the expert witnesses and every other employee or servant of the court down to the security guard.

Even bona fide victims, like newzea7, have learned to expect little from the criminal justice system as it is presently oriented, and they soon give up any hope of ever seeing justice.  The cops know that some smart-ass hair-splitter in a suit is going to decimate any case that isn't black-and-white, and they send that message along to victims, whether they've been stolen from or sexually assaulted.

Retuning the justice system to serve some independent interest would be a good start.