Definitely fewer cops required, not sure to 1/3. A lot of money would be saved in tossing the pensions.
Fewer cops, NO union protection, and use the money saved for prosecutors and prisons.
The current system has cops catching a guy, and he's back on the street on a plea bargain. Change the rules so that the criminal only gets one plea bargain. The next time, he WILL go to trial, and if convicted WILL stay in prison until he's too old and feeble to commit any more crimes.