Why is it profit motivation that does that?
Because when there is a profit motivation, then you can expect for innocent people to pay the price for actions they did not commit, on a regular basis.
No its not. Stats are not the main determinant of promotion or salary from my understanding and I don't directly it has any effect at all. They are judged by performance but obviously stats are completely dependant on what type of cases and the specific difficulty of the cases themselves.
I could be mistaken, but prosecuters keep a win loss record, and their demand (aka salary) will be based on this win loss record, and the higher the wins the higher the satisfaction of the da. Which essentially boils down to a lawyer for profit scenario. Is this right?