There is a very real possibility that people will be trafficked to work on this. Trafficking in construction workers is a huge problem in the Middle East. We tend to think of most trafficked people as "sex slaves," but there is a lot of trafficking in heavy labor there. Look up Kafala.

Unfortunately, this is an issue that isn't being addressed fast enough.While there have been reforms...

...if the Line happens it is quite likely it will be built by slaves.