This reminds a little bit of when people tell me we have to have undocumented workers getting paid below-minimum wage with, in practical terms, little protection from abuse because otherwise fruit or hotels would be more expensive. It seems so plainly morally bankrupt that I'm surprised how often I hear it.
b) get rid of the distinction between 'prosectuor' and 'public defendant' - make state laweyers take sides randomly (With coin flip) and reward them more for wins on defense than prosecution.
c) make private prisons pay the state a refund when any released prisons commits a new crime outside. Watch recidivism drop.