The unforgiving steward or servant is akin to unforgiving government. These are truly akin to the leaders of Jesus's day, the scribes, Pharisees, Saducees, leaders, captains etc. They were the government entity that was unwilling to forgive the people's folly, mistakes, blunder, stumble etc. And because of their hardness they were plagued with ghettousity or the manifestation of hellish behavior.
When the strong fail to forgive the weak plague sets in. Egypt, Babylon?
Building blocks for life