It's trick to deflect your attention
The reason the phone companies are racking it in, is because the cost* of connecting a call is minute, compared to what is charged.
The trick is,
with the new system you will have no control over the charges and probably pay more, oh, we better stick with the existing (overpriced) system. You've been deflected from a new system where you pay less.
Think of the cost of regulating who can ring you, because you have to pay to receive a call - it's nonsense.
With both fixed and mobile phone system, there is some capital cost (but the number of users makes this minute per user), land rental cost, maintenance cost, electric cost. The computers routing the calls are switched on all the time - there is no big (5p) cost in making or receiving a call. Hence VOIP is so cheap.