They're franchise workers. Workers who work in a postal franchise, such as a Shoppers Drug Mart or Lawtons, are not unionized. When Canada Post sets up a franchise, it's up to that franchise owner, be it Lawtons or Shoppers Drug Mart, to staff that position. Canada Post comes in, gives them their training, sets the computer up, and then they agree on what they're going to pay those individuals. It's up to the franchise owners to pay those individuals. In a corporate retail outlet, we're bound by collective agreement, so this is what we get paid. These people are getting paid far less for doing the same work.
On October 5th, 2016. See this statement in context.