"P-PLATE drivers will be given no second chances before having their licence cancelled under the toughest driving conditions yet being considered by the New South Wales Government."
http://www.news.com.au/story/0,23599,21025660-2,00.html
I dont think this is too bad of an idea, however, I believe they should remove the loss of demerit points for trivial offences such as not showing your p-plate. I've known friends who have lost points because one of their p-plates have come off whilst driving. I'm sure everyone uses that excuse, and that is why your not believed when you say it fell off, but I think if you fine people for that, it is enough.
I think this could work well, by installing some fear in young drivers to say that if you get caught just once, its all over for 3 months and you have to go through that test all over again.