I think I understand the spirit of your question, but the way you’ve worded it suggests that the law is immutable and/or that lawbreakers are necessarily evildoers. I interpret the question as “without incarceration, what do we do about those who do harm to others”. To that I would answer that we need institutions and programs that provide various types of care, support, and protection to people and that those who cause harm and do not provide restitution to their victims lose access to those institutions and programs. For example, if a child molester’s house burns down, the fire department would not be expected to try and save them. If it was arson then the arsonist might only get fined for creating an environmental hazard and putting adjacent buildings at risk. The lack of a carceral system would make funding available for the above programs and institutions.