The police definition for solving a crime is when someone has been arrested, not indicted or convicted. Police who "solve" a crime don't like it when the men they arrest and help convict turn out to be innocent, or even if they are released because evidence for conviction was insufficient or suspect. Honest cops, like honest businessmen, will take the hit and do the right thing. The dishonest ones don't.

In either case, there is an incentive to cheat, to lie, and for the innocent to suffer unjustly, whether they be the accused or the consumer or employee. It takes a strong sense of justice to accept responsibility for an honest mistake. It doesn't take much dishonesty to want to cover up incompetence or malfeasance.

This is why we have courts, laws and lawyers, because experience and history has shown this to be true. It's not because cops or prosecutors or businessmen are inherently crooked, its because there is always an incentive for them to be crooked. Careers, budgets, and reputations are at stake.

When the victim, whether of business or the law, is powerless, poor, or of an oppressed group or minority, there is not only an incentive, there is a constituency for injustice.