There's also the concept of price anchoring, where people believe that something they purchased has the same price long enough, they start to think that it alwa

There's also the concept of price anchoring, where people believe that something they purchased has the same price long enough, they start to think that it always should have the same price (regardless of everything else). And some people just love to complain about everything. During my childhood, my parents loved to comment about how gum/candy was a nickel when they grew up. They don't complain about the price of anything else going up, even though undoubtedly all the food prices have gone up in multiple decades. But they only bought candy at a short period in their life, and the price was the same from when they started and when they stopping buying candy, so they only have the "one true price" in memory. Everything else they have to purchase regularly so they're exposed to increasing prices. Just not candy.