1. Unless store security catches the thief at the door, many police departments don’t have the resources to track them down. So finding out that you were burgled within a couple days isn’t much better than finding out at a quarterly or even annual inventory.
2. It’s not that big of a problem. From the article: “Organized retail crime costs retailers an average of $719,548 per $1 billion in sales”. Putting that in a more accessible scale, that’s 72¢ per $1,000 of sales.
They then head to their car and leave. You try to take their license plate number. Oh wait it says "tag applied for".
Criminals regularly take the plates off when they do their work, if a cop pulls them over, they can say some story about how they needed to get it reattached, and no cop pulls over a car just because of a "tag applied for" sign because they know it will likely be just that 9 times out of 10, so if they did pull over that car its some other ticket-able offense, but no registration wont be likely part of that ticket.
Maybe you got a picture of their face? Except everyone wears masks now....
All the ambiguity involving that means you can basically just take off your license plate whenever you want and police dont look at as a particularly unusual or noteworthy thing to run across. Even if you dont put "tag applied for" at all most cops just assume thats the situation and wont pull you over for just that unless you are having some other violation going on.
I had a coworker who was robbed earlier this year and the person left in a car with a you guessed it "tag applied for" paper on the license plate section of their car.