What's the alternative? Surely you want prosecutors. Otherwise, there is no way to enforce the law. And we can't take away their discretion.
I suppose you could have them draw names out of a hat to prosecute that day, but other than a system that forces them to prosecute someone and not another, I don't see how you can take their judgment out of the equation.
They should also better question what these people's oaths to protect and defend our constitutions means to them as individuals and what their intentions are. Because, once they're in office, it's Katie bar the damned door as far as some of these runaway prosecutors and runaway Grand Juries inspired by these rabid prosecutors are concerned.
Look what that jerk prosecutor did to Tom Delay down there in your fair state!!! Look what jerks like Eliot Spitzer have done in NY state!!! Not to mention Niphong...