MrLiberty: End the failed war on drugs. We have no business putting children in jail for what they do with their bodies. Either they own their bodies, or the government does. When the government does — when they are in prison — the government clearly doesn't protect them. Drugs are a real problem, but solutions lie with the medical community and the home environment, not a prison cell.
Deal with crime in a fashion that focuses on restitution rather than retribution. Victims of real crimes — as opposed to lawmaker-created crimes like drugs, prostitution, gambling, etc. — deserve to be paid back and made whole. The purpose of our current system is to make the state happy by punishing lawbreakers with little or no concern for the victim. Far too many people profit from our current system, from the police to private prisons, thus incentivizing the persecution/prosecution of citizens. Hundreds of books have been written on this subject and a serious transformation that could occur.
Eliminate the government monopoly on law enforcement. From the police to the courts to the prisons to the jury to the DA to the defense attorneys (public defenders), the state holds the monopoly. With every monopoly comes inherent failure, as is evident across the “justice” system. Private courts are also detailed in hundreds of books that focus on free-market alternatives to the police state we have allowed to grow up around us.