9. Paul Ramsay

•  Net Worth: $2.5 B                                                                      
•  Source of Wealth: hospitals
•  Citizen: Australia
•  Age: 77

One of the wealthiest men from Sydney, Paul Ramsay founded Ramsay Health Care. His firm manages more than 100 hospitals in Australia as well as across Europe. He first started with a private psychiatric hospital and then wen on to make money by starting more hospitals.