Didn't you read it....

In Bahrain, your sponsor would be the ministry of labor. They will be able to kick you out of the country as they see fit. The aim is reducing foreign labor, not giving foreign labor the freedom to get any job they want

I could imagine their discussions:
"Let's reduce the XXXXXXs by 7%, we can increase the YYYYYYs by 2%".

"We need to be fair, let's kick people out randomly".

"It would be better to kick-out people who have been here longer".