The problem is how do we make migrating to such a scheme politically tenable? Right now we are in a situation where politicians dream up new "multiplier" laws (for instance, throwing on extra punishment or at least higher minimum punishments for committing a crime while wearing a mask) so that they can be seen as "tough on crime". We aren't just coasting in the wrong direction, we are making an effort to go in the wrong direction.
It seems hopeless to me. The general population doesn't give a shit, they are bloodthirsty and think of "criminals" as some distinct segment of society that they don't need to empathize with (hell, we can't even get executions widely abolished, a far more egregious issue...) So long as that is the case the politicians will keep on making the situation even worse for personal gain.