I'm sure most would agree that Jesus used non-historical material to illustrate truth. The question is, was He above using non-historical satirical material (i.e. biting irony) to make a point. I think the evidence suggests otherwise.
That Jesus did employ satire at times is quite evident in the gospels. Examples of this include, Matthew 9:13, where Jesus exempts the Pharisees from His redemptive plan because He only came for sinners, not “the righteous” and again in Luke 13:32-33 where Jesus ironically expresses that prophets cannot possibly perish anywhere except in Jerusalem.
32 And he said unto them, Go ye, and tell that fox, Behold, I cast out devils, and I do cures to day and to morrow, and the third day I shall be perfected. 33 Nevertheless I must walk to day, and to morrow, and the day following: for it cannot be that a prophet perish out of Jerusalem.
Of course, not all prophets perished in Jerusalem. Robertson identifies Jesus' proverbial statement here as; "a severely ironical indictment of Jerusalem."
Again, the preceeding account of the "crooked Steward" being commended by the Lord for looking after number one to the detriment of the Lord also represents satire. Of course "making friends with unrighteous mammon" does not earn heavenly merit. The opposite is true. This crooked steward story was actually an indictment against the Pharisees (as their reaction indicates in verse 14)
14. And the Pharisees also who were covetous, heard all these things: and they derided him.