No, the NIAA doesn't spend $30b a year on Indigenous programs, page-18

Estimated expenditure per person in 2012-13 was $43,449 for Aboriginal and Torres Strait Islander Australians, compared with $20,900 for other Australians (a ratio of 2.08 to 1

Not sure your 27 bill number is correct… the general population is approx half that number… read above