There are two parables in Luke 16, and in both of them Jesus speaks to the proper valuing of money and material resources. He puts things into proper perspective, and that makes them good texts for stewardship sermons. Stewardship is about more than paying bills. Stewardship is a reflection of our covenant relationship with God and with one another. The picture painted in the parable of Lazarus and the rich man is a bit clearer than the parable of the dishonest steward, but together they remind us about what it means to be a faithful disciple and about our responsibilities to each other.
There are several verses separating the two parables that the creators of the lectionary chose to omit. That is probably because passages like this can lead to anti-Jewish ideas. In this case Jesus chastises the Pharisees for being lovers of money. If we can steer clear of caricaturing the Pharisees as self-righteous money grubbers, perhaps we can hear in the omitted verses a reminder that the love of money can corrupt us and keep us from loving one another.