That's true, grocery stores made record profits during covid.
I've sometimes toyed with the idea of an "open sourced" grocery store that's extremely transparent about every detail. Think electronic price tags that give you a complete breakdown of the cost of an item, cost of labor, cost to account for "loss", over/under-supply, etc.
I feel like there's a niche out there for hyperinformed consumers
I think with this openness the problem is there’s so many fluctuations and estimates that average consumer would think you’re being dishonest even if you weren’t. They’d see that you acquired an item for $20 and could never quite understand why they have to pay you $50. They’d see the plethora of line item costs as nickel and diming even if many are absolute hard costs. They’d see the estimated numbers as inflated.
There are coop grocery stores where members get to see the financials at a high level and make price changes that make the market sustainable. This is usually some form of shared ownership but I think this is a better way to achieve similar goals.
That's basically Costco, the price they pay is what you pay, the system paired down to bare necessities, and it is incredibly popular.