I understand that suppliers cant change prices every month because they are not sure of the costs, but they are very quick to raise prices when petrol does go up.
I'm curious, how many people here *actually* regularly do much (or any) price-comparison-based shopping? I mean, I'll be the first to admit, I'll just buy a loaf of bread from whatever place is nearest to me, without even looking at the price. And even once I'm there, I'll choose a loaf not on which is cheapest, but on which one has the longest to go until the expiration date. I seldom compare prices for groceries, but when I occasionally do, I find there are sometimes big differences in prices between different places ... but with the proportion of my monthly expenses that my typical average grocery bills represent, the potential savings by comparing prices don't seem to be worth the time and effort required to do so (especially since quality differences, which for things like fruit can be huge, make decisions more complex). Clearly I'm not giving retailers any incentive to lower their prices, but is my shopping behaviour representative of the average? Who here compares prices? Or has e.g. a husband/wife or family member do that? My last girlfriend did that sort of thing and it made a worthwhile difference to the bills. Maybe we should set up websites or something that allow easy price comparison for typical 'baskets of goods' etc. at various outlets, I don't know.
The concept of "passing on savings" by lowering prices for customers will happen if it's possible and there is competition. It's that simple. I think to assume that retailers never lower prices is silly (just typical anti-corporate "ooh greed" brainwashing), I'm sure they do, we probably just don't notice when they do.