Matthew 18:32
Then his master summoned him and said to him: you wicked servant! I forgave you all that debt because you pleaded with me. The master's characterization of the first servant as wicked and the explanation of the forgiveness — I forgave you all that debt because you pleaded — communicates the fundamental injustice of the behavior. The wickedness is not that the servant demanded payment but that he demanded it from someone after being forgiven an impossibly larger amount.