If you insist on reducing phenomenally complex systems to three letter words: yes. But your three bullet points, and maybe one or two more of equal breadth, cover one hell of a lot of individual “transactions.” It’s utterly self-serving to pick and choose your choices to include only “gallon of milk” instances.
Which leads to the real issue: it’s not possible to have a very meaningful discussion on this point because “Ruken” and “Shodan” and “Dibbs” and “TommzNR” - and “Amateur Barbarian” - can make up any reality they like, and it’s impossible to argue or defend except in generalities waving in the breeze.
A lot of people stop in here to pour out what are essentially deep mental-health problems. The better among us try to help them, but it’s usually no, no, no, no and no… they aren’t doing any of those things and this isn’t happening and the GF really did do this crazy-ass thing… it’s not only all subjective, but anonymous and likely subject to a high degree of self-delusion.
Personal economics discussions aren’t much better. You can say anything you like about your buying habits, choices of lifestyle, “exchanges,” etc. and there’s absolutely no way to question them unless you, well, voluntarily commit to an honest exchange. (And no way to verify that you are.)
Just as five minutes in person with one of those troubled souls would likely point to the truth of their problems, five minutes in your house would tell me a lot of truth about your putative economic principles. But you’re not likely to invite me over, or any equivalent, so we’re reduced to being a bunch of shadow puppets arguing generalities.
I’m prepared to argue my position from square one to square n… but this isn’t a very good venue for it and the times it’s come up, it would be a huge hijacking of the thread to do so. My arguments from principle and theory are just subject to to being beaten up by sock puppets who can claim anything they like about how they apply to their RW lives - pointless.
So I make what comments I see as constructive in any given thread about personal/consumer economics, and I can see those who get it, and just sigh when others get all pissy about my “ramblings.”