High population growth, changing community needs and an ageing population will spur investment in social infrastructure. : High population growth, changing community needs and an ageing population will spur investment in social infrastructure. Speaking at the Property Funds Association conference, Arena REIT managing director Rob de Vos said: "An ageing population and proportionately fewer tax payers will create challenges for government funding, but this opens up significant opportunities for the private sector and for investors." Currently, social infrastructure is considered an alternative, but de Vos is of the belief it is rapidly becoming mainstream.