Thanks, everyone, for your thoughts. They've helped me to see that on reflection, my phone-communicating friends' situation is perhaps not all that relevant to the kind of issues which this board addresses. It's just that this particular matter was brought to my mind especially by one poster's mention on the "Do you answer..?" thread, of how one way of doing things, resulted in the phone conversations being paid for by her, not the other party; though in that case, the poster was perfectly happy with that outcome.
With another set of people -- I'm tempted to say, "with sensible people" -- raising and discussing the matter, and -- all being well -- reaching a compromise; would likely be perfectly feasible, and the way to go. However, folk are sometimes a variety of things -- "cross-grained", and "pig-headed" come to mind -- whereby in matters of this sort, they just don't "do sensible". Those concerned in the situation which I describe, are in that category. My friend and his wife differ from each other in many ways -- some of them, polar-opposite ways; plus, they come from different cultures; and both are highly stubborn and extremely determined not to be doormats. Their marriage is full of mutual dissension; it's a source of some amazement to me that after half a lifetime of marriage, they are still together -- and in their way, it seems, fond of each other.
Plus, the friends on the other end of the phone convos are, essentially, the wife's friends; and of the same culture as her -- a culture which tends toward behaviour which is highly spontaneous and spur-of-the-moment, and very "not-into" planning / logistical stuff. Trying here to bring the situation into the open with these people, and discuss in search of a compromise, simply would not work -- my friend, the husband, would be regarded by the others as though he were some alien from outer space. Thus -- as told of in my OP -- he found he had to, to some extent, play the controlling and authoritarian spouse. I was, just, prompted to muse a bit, on the general "spectrum" between the extremes of people catering to the logistics of how others do things; and being of the opinion that it's selfish and unrealistic to expect from others, any of that kind of "catering" whatever.
I guess what I take away from that situation is that:
(1) Everyone has different routines and ways of doing things.
(2) Assigning what sounds like malice to people who have a different way of doing things is asking for aggravation.
Just because people eat earlier than you is no reason that they are trying to stick you with the phone bill. But I have known people like that. Not necessarily with with meal times and phone calls, but ascribing some underlying machinations for what was most likely just chance. Is that how you see life? Not for me.
I'd seek to exculpate myself by saying that I don't see life that way (hope I don't, at least

) -- it's my friend who does, I fear, have that tendency. In many ways he is, believe it or not, a terrific guy; but in all matters to do with money, he's Scrooge reincarnated; and he's a walking example of the thing by which "just because you're paranoid, doesn't mean that everyone isn't out to get you".