There seems to be a clear notion of "taking into consideration" the humanity of others in the Formula of Humanity.
- "Every rational being exists as an end in himself, not merely as a means for arbitrary use by this or that will: he must in all his actions... always be viewed at the same time as an end."
It would seem that Kant enjoins respect for human beings as what is fundamental to ethics (a point easily accepted) however, I struggle to see how this might align with certain conceptions of justice. For instance criminal sentences that are disproportionately harsh in order to deter prospective offenders (marijuana legislation in Bali). In this instance, doesn't the prisoner become 'instrumental' in meeting ends that seek to be optimific for the broader society, i.e. Deterring people from trafficking illicit drugs.
Would such laws be immoral in a Kantian sense? Is it as simple as a Utilitarian moral attitude being expressed in such laws, or does something further stand in opposition to Kant in this case?