The average teenager that just steals because they think being a klepto is cool would probably be deterred by the door watchers though, yeah.
But working in retail, probably a factor bigger than shrinkage is just people picking things up, and throwing it at the back of a shelf in a different aisle. Either they're saving it for a return visit, or they don't want it anymore and are too lazy to bring it back to its shelf.
These are just my observations. I think we're down a rabbit hole of assuming the problem anyway. The main problem with Costco is probably just that they don't have a system for counting individual items, since most things in the store are just wheeled out on pallets and dropped somewhere.
Totally agree with you on the rabbit hole.
The big push of retailers closing stores due to theft is an exaggeration when in mosts cases its just reduced in-store traffic and online ordering which doesn't require the stores to be as big for holding as much inventory.[2][3]
Most of the major retailers stats are old and if the numbers were really of concern I'm sure they would release the data but my assumption is their complaint doesn't seem as reactionary when you compare it to their profits. I cite this generic article as an example[4]. It appears to want you to think that theft is such a major part of the retailers problem but no specifics provided with phrasing like "has historically been" or $400 million in theft when the company has made $109 billion with 3% growth[5].
[1] https://www.irs.gov/pub/irs-pdf/p584b.pdf
[2] https://www.cleveland.com/news/2023/04/target-to-close-store...
[3] https://blog.gitnux.com/walmart-theft-statistics/
[4] https://www.wsaz.com/2022/12/09/walmart-may-close-stores-inc...
[5] https://corporate.target.com/annual-reports/2022/financials/...
Whatever Target,l and Home Depot are doing works like 99% of the time for me.
Having it say you have none, and then you go to the store anyway to get an alternate and you find what you originally wanted sitting on the shelf, that's annoying.