They can "solve" the bandwidth problem by having the cloud services only enabled if the user is on WiFi. Kinda defeats the purpose of the "cloud", but it is a start.

Since, the US, they are now on two carriers, they just need either Verizon or AT&T to start touting they are the carrier of choice to provide the cloud for iPhone that the other carrier will have to increase their data usage tier. Now, this is a long shot scenario, but Apple has shown a history of doing things without consulting the carriers before.