Are you serious? You have to separate the State from the judiciary, otherwise you'll get pressure to get a conviction regardless of the facts. Take a look at the Police who are under constant pressure to produce figures rather than ensure that the best cases are presented. Transfer that pressure to a less than independent judiciary and it becomes a weapon of the state. A government wants a clampdown on violent assaults, you WILL get more convictions for violent assault. It is hugely dangerous to civil liberties to conduct justice in this manner.
I mentioned the Serious Fraud Office who have to prosecute the most complex cases of all. Even with the present system of jury trials, they have just about the best percentage of successful prosecutions. The reason is that they present the cases well and prosecute the right cases.