I learnt in the 90s that the DWP (or whatever they called themselves then) regarded a fridge as a "luxury item" and not a necessity. As a mate put it "YOU try keeping milk drinkable on a hot day without one".
When I was a little boy, we didn't have a fridge. We had a pantry, and we had a milkman, who delivered fresh milk everyday.
The fridge arrived when I was seven, but we managed very well before it arrived. So, from my perspective, it remains a luxury item in absolute terms.
I also see my stereo system as a luxury item, and have always done so because it isn't essential to life, although I do often view it as essential to my life.