Canada

The situation kinda sucks but it is what it is. Basically, we've got private delivery firms with non-unionized employees and gig workers taking up the more lucrative package delivery business, with the crappy money-losing mail business going to Canada Post. Uniuni, Dragonfly, and Intelcom are replacing Canada Post. But Canada Post's union shot themselves in the foot by going on strike multiple times, for long enough that businesses switched away from using them because they're seen as unreliable now.

The gig worker model seems to be more efficient and clearly the investors of these companies agree, so I don't see any economic force that's going to stop things from continue in the direction that they are. There is still competition here though between these companies for small parcel delivery, so it's keeping shipping prices down.

P.S. this is also the model for private healthcare in Ontario that they're attempting - farm out the lucrative procedures to private clinics, with the expensive and risky treatments being done in public hospitals. So watch for that...