I think that you misunderstand remote Indigenous communities. While you are correct that they operate like any other community you are incorrect in assuming that this means jobs. For the most part they are simply too small and/or do not produce anything.
There are around 1,200 remote indigenous communities with a population of around 120,000 (30% of the total indigenous pop). So the average size is around 100.
While this is ample population to support hunter-gatherer type existense communities of these sizes are simply too small to support a services industry. There isn't enough work for a doctor or a tradie and not enough customers for a supermarket... and they are so separate that these businesses can't service multiple communities.
So this means that money has to come in from outside - the community has to produce something. Tourism, pastoral leases, mining leases and artwork are examples of this. But because there isn't a mine or a kakadu in every community it isn't enough. Enter welfare.
Welfare of various sorts goes into communities. Housing, health, education, CDEP, etc. And it flows back out in the purchasing of food, clothes, liqour, etc which are not produced in the community. There are no jobs so it is hard to wean communities off this welfare and it has created a culture of entitlement and 'sit-down money'.
Current govt policy does not acknowledge that some communities are not viable in the developed sense of the word. They could be hunter-gatherers but they can not be a developed community.