UNFORGIVING MASTER?

There's too much talk of God's forgiveness in Scripture for Him to act in a strictly unforgiving manner towards all of humanity ultimately.

(I am not suggesting universalism - I am saying that however we might conceive of it, Christ's death conceived as absorbing all of the Father's wrath as our substitution doesn't seem to fit the thrust of Scripture and the portrayal of God's character contained therein.)  

For just one example, how do we make sense of Penal Substitutionary Atonement in light of Jesus' parable of the unforgiving servant in Matthew 18? 

Remember?

23 ... The kingdom of heaven is like a king who wanted to settle accounts with his servants. 24 As he began the settlements, a debtor was brought to him owing ten thousand talents. 25 Since the man was unable to pay, the master ordered that he be sold to pay his debt, along with his wife and children and everything he owned.

26Then the servant fell on his knees before him. ‘Have patience with me,’ he begged, ‘and I will pay back everything.’

27His master had compassion on him, forgave his debt, and released him.

That's what forgiveness of debt looks like. The original threat is what the wrath of God would look like. (Just because I am rethinking PSA does not mean I don't believe humans stand justly condemned before God!) 

If you remember how that parable concludes, you'll recall that the aforementioned penalty is finally reinstituted for that servant, but only after he fails to express similar forgiveness to another servant who owed him money. 

Forgiveness of the debt involves the "lender" letting go of his claim to payment.

And we are taught by Jesus specifically to forgive as we have been forgiven.

Where does that leave PSA?