My parents and my husband's parents had to manage in war and postwar times and endured years of rationing. They were inevitably frugal. I well remember my mother making a packet of ten fish fingers go round four of us:- three for her and my father and two for we children. She also gave us a packet Vesta curry for one between four of us on Saturdays and eked it out with a tin of cooked meat.
My in-laws ate home grown veg from the garden and my MIL made jams, marmalade and chutney in season. All delicious, of course and better than anything you could buy. In the MIL's value system a woman who gave her family 'shop bought cake' was not in the top rank.
I absolutely love the extensive and luxurious range of food from all over the world that is available now at a reasonable cost but I am still frugal as I feel that this is only ethical as waste is to be avoided when so many go without. I plan meals and eat plainly in the week leaving treats (and alcohol) to the weekend. I, too, now make cakes, jams, bread, curd, marmalade and other preserved goodies.
It makes me smile to think of the tinned salmon (one tin between four) salad with tinned mandarins and tinned cream we had on Sunday afternoons in the old days and the sole, Champagne and home made Florentines we have now.