The Great Australian Dream - Own 60% and be happy

When did the "Great Australian Dream" become the government owning 40% of your home?
Y̶o̶u̶ ̶w̶i̶l̶l̶ ̶o̶w̶n̶ ̶6̶0̶%̶ ̶a̶n̶d̶ ̶b̶e̶ ̶h̶a̶p̶p̶y̶.
You will own nothing and be happy...