I'm not going to try to dive really deeply into the level of the technology design decisions that would warrant this, but the real challenge is that there's no easy way to move the ownership of a phone number from one party to another and delegate that responsibility. This is being worked on now, but in digital certificates it's highly difficult.
It really comes down to how we treat the reseller phone companies. They have always, in the phone networks of Canada, been lesser than the parents, but there's never been a reason for that to be an issue. If we allow more carriers to rise up to the facilities-based level, with SIP interconnections and such things, we can solve some of these issues.
It really goes back to the way the whole resale system was designed, and it can't easily be overhauled.