Democracy or Market? Rifondazione's Paolo Ferrero and Die Linke's Oskar Lafontaine have a go at this:

http://www.youtube.com/watch?v=hEUjob1QY_0 (Part 1)
http://www.youtube.com/watch?v=xZYYtn2GGPY (Part 2)
http://www.youtube.com/watch?v=qTSbYWJgw1w (Part 3)
http://www.youtube.com/watch?v=S0CNCshklhA (Part 4)
http://www.youtube.com/watch?v=6Kjml1GVBE4 (Part 5)

And more (25 parts total):

http://www.youtube.com/user/FedericaPezzoli