Very thought provoking interpretation of this parable. Most of the time people think and argue that Jesus speaks out against the third slave. 
We hyper-spiritualize the Gospels so much that most Christians that I meet tend to think that talk of economics and politics aren’t really a part of the Gospel. In the Kingdom, God’s order in which the economics of Jubilee are supreme, there is no place for riches – a rich person must divest and redistribute – there are no rich or poor in the Kingdom – each one has enough – no one has too much. If loans are not repaid after seven years, we are to write them off. It is this equality that puts off rich people who very much need assurance that they can hold on to their wealth and still rest assured of a place in God’s life to come. Even the disciples were amazed at such talk, but Jesus gives them hope of such equality because “for God all things are possible.”
We are being asked to speak to our own reality, our own indebtedness as a society and how to see ourselves in need of Jubilee or “(re-)distribution”. Recognizing that “(re-)distribution” is a scary word that will probably turn off many, even in “the community of faith” we quite clearly need to affirm our acceptance of the axiom of equity.