A cardboard box tycoon topped the list.
Ms Rinehart is in the Queensland city to support the Aussie athletes
Palaszczuk Government warned to prepare for new onslaught
Most wealthy have interests in agriculture.
FORMER wife of late tycoon Alan Bond slams Channel 9 telemovie.
Gina says Australian politicians could learn from Donald Trump
Scott Morrison says Australians will hold majority interest
Ginia Rinehart has tied the knot with her Nambour sweetheart
REVEALED: Who is the newest member of Gina Rinehart's family?
Ginia Rinehart is set to wed this week on Hamilton Island
Galilee Basin mine tied up in court appeal
Mining manager takes court stand at Kevin's Corner trial
Gina Rinehart still on top of rich list