The challenge I see to the argument that "Life with the possibility of parole" is somehow better than "Life without the possibility of parole".... is but for who? Who really benefits? As an incentive for the convict to act appropriately in prison and maybe be less of a workload for the guards? As a jobs program for all those councelors and teachers and workshop providers who, in theory, are preparing the convict for a future outside? As a political "feel good" measure to the general public with a wink/nod that "bad" convicts won't be released ever?... or worse, as a political "feel bad" measure to the public whenever budgets get tight and the governments quietly speak of early release to save some money?
The last persons who benefit from the distinction are the convict and their victim(s) or victim(s) family/friends/community.
Taking a 13 year old burglar/rapist and keeping him locked up until sometime when somebody far in the future decides to throw him out on the street, untrained, uninsured, unemployable at the age of 50+ certainly doesn't help the institutionalized convict. It is an insult to the victim. It threatens the future community, witness the recent case where a rapist held for 15 years came out and killed multiple victims, apparently while passing various parole officer visits somehow while the bodies decayed in the cellar.
It also calls into question the entire fairness of the parole review process, every bit as possibly tainted as a bad trial process may be, but with the added threat that while their might be a small chance an innocent is convicted, there is a large chance the already convicted and potentially dangerous may be released to commit crimes again.
And all this so we can still call ourselves sympathetic, understanding, kind and optimistic? I fell pretty comfortable calling myself those things by virtue of providing a pretty fair judicial system, a well funded secure prison system with 3 meals a day, exercise and TV privledges, jobs within the prison... all knowing the convicts will never come out and might actually BE BETTER OFF in prison than on the streets.