Gary, Your assumption would be wrong.  I define it as ineffective and non-persuasive.  This kind of sarcasm may be good if one is speaking to an audience that already agrees with the viewpoint at a pep rally.  Wealth disparity and wealth concentration is a real and critical problem that needs to be dealt with.  Ann found no ally in me, I would be embarrassed to have her on my side if I was making a presentation on the issue.  The goal is to get people to change their position, not ignore the speaker or rise up and leave.