Salvatore Luppus is one of the characters in Jagged Alliance 2.
Unfortunately, he is even more unreliable than Pablo. Not only is he going to lose small amounts of stuff, but a lot of times, he loses the entire shipment! Threats have no effect on him as he does it through sheer incompetence.
After killing Salvatore, no one will be able to settle the further shipments to the airport. No more guns and stuff from Bobby Ray's.
So, don't kill Pablo :)