A truly effective criminal justice system would be built on restitution, not imprisonment and punishment. Moreover, government-funded prisons have no incentive to rehabilitate prisons since they receive funding regardless of outcomes.
In a free society, defamation would be a nonissue. No one would be able to use the courts to punish other people for the things they say or write. The only exception would be if a person voluntarily signed, then violated, a contract agreeing not to say certain things.
Recycling isn't free. It requires the use of time and resources, many of which end up wasted. But politicians keep insisting that recycling is always a win-win, even though we have many examples to the contrary.