It was Outback Steakhouse, haha. Just a bit of decoration and some different names on the menu (the French fries are called "Aussie fries" XP). I don't think anybody eats Outback's portions in one sitting. I used to get the ribs from there, and they would feed me for three dinners (except when I was younger, when I could easily eat an entire rack of ribs and more, all at once... My appetite has slowed enormously in the last few years). I just got the salmon last night, which is actually a normal portion size.
The reason American restaurants have such large portions is because a lot of Americans are obsessed with getting the most out of their money. If we can get three meals' worth of food for $20, we'll take it.
Also, "bogans" seem to be a lot like suburban rednecks are over here, according to those urban dictionary definitions. White trash, etc... Though I assume bogan is a race neutral term, which is amazing, because we don't have a word like that that won't offend somebody yet. I may start using it...