A wholly just culture is almost certainly an unattainable ideal. However, an organization in which most of its members believe that justice will usually be dispensed is within the bounds of possibility. Two (2) things are clear at the outset.
First, it would be quite unacceptable to punish all errors and unsafe acts regardless of their origins and circumstances.
Second, it would be equally unacceptable to give blanket immunity from sanctions to all actions that could or did, contribute to organizational accidents.