So if the government would take a true rehabilitative approach, and maybe arrest people but treat them well, try to help them so they don't do the same behaviors in the future, a percentage of the population might see that as insufficient and take retribution into their own hands.
You've helped me realize why I've actually shifted my professional focus from wanting to change politics to wanting to change culture. Seems a lot of being in government is doing what the people want, and if the people want retribution, then the government has to follow it.
I hope for (and am working towards) a world in which we help people know our pain not by trying to cause the same pain to them, but by expressing our pain to them with more granularity, because the pain they'd feel as a result of retribution will never be the exact same pain we feel, as our contexts are way too complex to replicate exactly.
I really appreciate your comment, thank you for helping me think more deeply about this.