It makes their job easier. If they have 100 cases to prosecute and they can get 95% to enter a plea deal, now they only have 5 cases to worry about. If 5% of th

It makes their job easier. If they have 100 cases to prosecute and they can get 95% to enter a plea deal, now they only have 5 cases to worry about. If 5% of those who plead guilty are actually innocent, the prosecutor doesn't really care because it's not a case he/she has to go to trial over.