Yellowknife earnings aren't comparable to earnings in the other cities. Living in the Northwest Territories, or anywhere in Northern Canada for that matter, means paying huge prices for anything.
The price of purchasing nearly everything is tripled from that which most people pay in other areas of North America. While the prices aren't as steep as some towns in places like Nunavut and Northern Ontario, Yellowknife is pricey as fuck to live in. Thus the reason for such high income. When one considers the price to live in such a place the incoming earnings compare fairly reasonably to the rest of the cities you mentioned.
Here is a piece of information for your browsing pleasure:
https://www.numbeo.com/cost-of-living/in/Yellowknife
Not far away you'll see communities like Tulita, NWT paying prices much like this:
The price of purchasing nearly everything is tripled from that which most people pay in other areas of North America. While the prices aren't as steep as some towns in places like Nunavut and Northern Ontario, Yellowknife is pricey as fuck to live in. Thus the reason for such high income. When one considers the price to live in such a place the incoming earnings compare fairly reasonably to the rest of the cities you mentioned.
Here is a piece of information for your browsing pleasure:
https://www.numbeo.com/cost-of-living/in/Yellowknife
Not far away you'll see communities like Tulita, NWT paying prices much like this:
![[Image: flour-flown-in-to-tulita-nwt-53-49.jpg]](https://i.cbc.ca/1.3414618.1453422593!/fileImage/httpImage/image.jpg_gen/derivatives/16x9_620/flour-flown-in-to-tulita-nwt-53-49.jpg)