Limited Pay
According to what I have read, they can only pay expats the equivalent of what they pay locals. Only under this condition will the gov't allow them to bring in foreign pilots, so either they raise all pilots salaries (the preferable option, but for a low cost carrier, this is not going to happen), or they try to attact expats for a year at a time with bottom dollar wages, and in this economy (especially in the aviation community where the jobs are few and far between), they will be able to find rent-a-pilots to fill the seats.
Only a plethora of jobs opening up in the rest of the world will change the supply and demand curve back to the pilots' favor. As long as there is a glut of pilots, and there is a big glut right now, there will be people willing and able to fly for what the Batavia's of the world are willing to pay.
That said, if you have the qualifications, and need to build time instead of sitting home and looking for a job that you may or may not find, this may turn out to be an adventure worth the pain of low pay for year.