You have to worry more than just getting paid salary as the DO there pockets your perdium for himself.
Than you also have to have ticket money as they will not buy your tickets to and from. They say they Weill reimburse but that never happens either.
And lastly you will be kindly be asked by the Ramada Hotel in Karachi to pay for your hotel as they skip paying those also.
So I would bank at least five thousand euros to get yourself out.
The last guys that left had to pay out of pocket the govt a two thousand dollar fine for visa violations as the company had screwed up the business visas.