Telephony service?
Google voice is unlike any other telephony service I've used as it requires you to have a phone to use it.
Complaining about Google doing this is like complaining about UK operators with unlimited calls, but excluding calls to mobiles.
Would you be happier if Google just charged the actual rate for the call?
It's not at all like network neutrality. Typically the charge for sending traffic to one US state costs the same as sending to another state. There certainly isn't a hundred fold difference.
The situation you seem to desire would be like Google setting up in the Midwest with other operators legally obliged to connect to them and also to pay Google per kb of data transferred. It makes no sense and Google shouldn't be forced to curtail a valuable application because a very small number of firms exploit rules that were designed to protect rural communities, not benefit big business..