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
One of the reasons I like costco actually 10% or so is a fine margin to pay.
I guess I'm thinking of something like dynamic pricing, except instead of it being used to manipulate consumers into paying the most they can possibly pay, it's used to give you really transparent, real-time information about what goes into that final pricetag
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.
The reason I used the word "open sourced" is because I think a good goal to shoot for would be to allow anyone else to learn and copy the structure/data/model. It'd be more of an experiment than anything else. Like a "let's teach everyone how a grocery store actually works" thing. Maybe even a non-profit