he cannot get back the salary if he is not coming to qatar as he didnt inform that he will not come back. He shall have many responsibilities before leaving the company permanantely like handing over the work to the next executive and mail forwarding etc...

As he didnt resign then who will pay the company the extra visa charges for the available month of visa expiration...

Company has heired him for work, if he left in between without informing then the companies takes time to adjust next person on this position. May be for 3 months. So who will pay that 3 months salary ....

You have to pay to the compnay ... not the company...