Pardon all non-violent drug offenders who have spent more than 10 years in prison.

This is a matter of compassion and justice. Once incarcerated, users' prospects and those of their families, already often limited, instantly decrease. For the most part, when these folks enter jail, they're marginalized --disproportionately people of color and the poor -- but not violent or dangerous.
Our communities certainly aren't the beneficiaries either, considering that a larger proportion of our populace is jailed than that of any other country in the world, including the most dictatorial and repressive regimes. That means thousands of children are growing up without one or more parents, some of whom will have to be put in foster care, where 50% will have chronic medical problems and 80 percent serious emotional issues.