It is true that once you enter a Property Irregularity Report (PIR) after your luggage is missing, nobody goes to look for your luggage. Your luggage is merely flagged in the system, so that once it gets scanned somewhere on this planet, it will be manually re-labeled to the correct destination. Besides, how would it help to know where the bag was last seen? What would you do if you knew it was last seen in AMS? There is no-one to call to do something, your bag will most likely eventually be scanned and then re-routed as required.