The Margaritaville Episode on the World Financial Crisis WFC is a classic. It plays on the bewilderment and confusion surrounding the collapse.
http://www.southparkstudios.com/guide/1303/
It also explains the chicken noises Uni Board meetings.
This link is to the SP site so there are no copyright issues if you link to it in class.
I don’t think this episode has screened in Australia yet, so you can’t copy it (for the rules on copying from TV check http://www.screenrights.org/copyright/australia/educational-institutions/universites.php )