Instead of getting a free car or advanced driving lessons, they should get either advanced driving lessons, a driving awareness course (like the one you get if you are caught speeding, using a mobile phone,etc), or, if their driving is good, a car. Advanced driving lessons aren't going to help with the attitude problem that some of the participants obviously have, whereas driving awareness courses have been proven to do just this.
I think that this is the way that it should have gone:
Show 1:
Guy - driving awareness course, for excessive speeding and attempting to drive while drunk (both of which would have resulted in bans if stopped by Police)
Girl - driving awareness course, for repeatedly using mobile phone
Show 2:
Guy - driving awareness course, for a general bad attitude, attempting to drink drive, plus going through ONE red light at speed (the other two were on amber before he crossed the stop line)
Girl - unsure, she went through a red light (cautiously, and looking both ways first), but that was the only real bad thing that I remember her doing
Show 3:
Guy - car, apart from the driving with mist on the windscreen, his driving was excellent
Girl - advanced driving lessons, her problem was obviously ability rather than attitude