Raising money is rarely easy - and it's no different when it comes to attracting funds for a good cause. In Australia, donations and legacies from households reach nearly 3bn Australian dollars ($2.1bn;£1.4) every year. And charities say donors are increasingly wanting to know how the money is being spent. With so many organisations vying for cash, the sector has been forced to become more professional. Phil Mercer takes a closer look at the business of giving in Sydney.