I have several thoughts. Some of the fly-in, fly-out is very much cost-based as well as skills-based, where to find the skills and knowledge that are needed to run those enterprises, activities projects, whatever they are. Fundamentally, it's building local skills capacity and how to achieve that.
That being said, for parts of the north as well, people who were born and raised in those communities would prefer to stay. They would like to work near the communities, with their communities, so retaining people in the north is not the critical issue.