They have everyone by the ball's
Simple as that. They know they are 200 pound gorilla with the biggest cell network in the country so if people want the best then they will pay. This may get some defectors spread out through the rest of the providers, but it comes down to the reliability of the network. And most large corporations use them, so even if they a mass of people run to other providers it wouldn't hurt there purse at all.
Yeah, Verizon doesn't owe anybody anything. It's clear from their halt to FIOS expansion and selling off to rural telcos. They will be a premium provider for people who can pay +$200/mo. Everybody else can use AOL and Cricket Wireless.