What kind of staffing are you referring to, and how does mobile checkout help this situation? At the Walgreens near where I live they sometimes have a security

What kind of staffing are you referring to, and how does mobile checkout help this situation? At the Walgreens near where I live they sometimes have a security guard at the door, sometimes not. They only allow one of the two doors to open. If the guard isn’t there you’ll see teenagers walk in, dump a bunch of their stuff in a backpack, grab as much as they can carry, and walk out. They come back five minutes later and do it again. This is with a lot of staff on the floor, who recognize them when they come back in. The staff have likely been told not to try to stop them, because it’s a liability for Walgreens. The security does seem to help but even that doesn’t completely stop people from trying. I have seen the security follow people they recognize into the store and then end up chasing them out but the perpetrators still get away. Even more security might help to block the door in that case, but that’s the only useful mitigation I’ve seen in these cases.