I don't have to know if I'm calling a mobile or a landline. In fact, a lot of people in the US pay a flat rate to any number in ANY area code in the country.
Let me pick a country I call often from my plan's list. Germany. I see two rates for landlines (49 for Telekom and 49115 for civil services), and then six rates for mobiles based on five major carriers and a sixth catch-all that is 5 times more than the others.
For kicks, let's look up India. Nice. 18 rates.
It's actually not so complicated, but it's certainly often a good idea to know which carrier someone is using when you are calling them on the mobile phone. There are, however, also plans that treat all carriers the same.
I know because I was surprised with $400 cell phone bills maxing out my credit cards after a few months over there, thinking the exact same thing, that I paid "the rate from their location to the destination area code" - which we do not.
Most people are on multi-year contracts with substantial break frees (in the $200 range). There are also charges to change your number and so on and so on...
There's no "paying" vs. "not paying" conflict here.
I have no problem about the cost of buying a local mobile anywhere I travel in the world, the the US being the exception (have not yet travelled to Canada, which is shameful as I have family and friends there).
I found the comment of all the US carriers operating the same policy and therefore not being able to walk away. Surely that is grounds enough for a complaint about price fixing, using the rest of the world as a case study?