This burger is really a promotional / silly Australian type thing, to get people from the cities, in groups, out to a remote country area to spend their $$$. As I said, groups of famous footballers and all types of teams have gone out there to share one, get photo's and then return to the city.
Very smart promotion IMHO... to help get cash into the country areas.
It is unrealistic to think youth are going to eat healthy all the time, especially when active youth have a metabolism that would digest the above, and worse (McDonalds , Burger King, etc), without a hiccup. I think if you had a bunch of middle aged people going to eat that... it would be weight on... but kids having a good time sharing a disgusting massive burger and having photo's, some beers and such... AWESOME!