Now I'd say it's a company selling stolen goods.
Airlines know who is the owner of that luggage. They have the sticker with flight, booking number, they have the contact details of the owner, and most owners put a tag with their contact info on the luggage.
They were hired to provide the sole service of transporting the luggage and owner from A to B. It's their only job. And they fail and steal your belongings and sell it for a profit, to a fence