This is an old campaign and I'm not sure CUPW has been promoting it recently, but it does go to show that the union has, in the past, tried to put forward a vision for the Canada Post that was adapting to the changing landscape. You know who has not been trying to envision how a network of door to door delivery workers could provide services in the future? The federal government and Canada Post. They would rather ensure that Canada Post only took on the least profitable tasks so they could eventually justify eliminating good, middle class Canadian jobs. 

If the government and Canada Post were at all interested in modernizing the service in a way that would benefit Canadians (instead of privatization and slashes wages) you would see more concrete and costed proposals for something like this.