stated as tersely as possible, the food security issues are an entirely artificial problem that was created on purpose. and, how did we get here?
well, there have been people living there for thousands of years, and they always had plenty to eat before - they ate high fat diets of caribou, seals, walrus, narwhal and supplemented shrubs. it may be hard to grow plants that far north most of the year, but there's not an actual deficit of things to eat. and, what has happened?
what happened is that we moved in, rounded the people up into settled camps (stopping them from migrating) and fed them by shipping in food from the south. we also brought in the church to brainwash them into colonial living norms, which led to the demonization of traditional food sources as "country food", and a people raised to interpret their own traditions as backwards and satanic. the next things that came in were oil and guns; dogsleds became replaced by skidoos, spears by rifles. and, over time, they've forgotten how to hunt.
i'm not sure that it is possible, or even makes sense, to talk about undoing this. but, you can't truly address the issue without understanding that we did this on purpose, to separate these people from their heritage.
and, yes - now they're hooked on doritos and coke, because it's what we fed them with.
these areas are more than capable of sustaining their own food networks, but in order to get to that point you have to loosen the colonial grip that the federal government has put in place in order to prevent it.