There are labourers doing major renovations on my villa at the moment and i can assure you they are collected at about 11am and return after 3pm and work for another few hours. UKeng is spot on, Qatar is doing what they can and in the main, these laws are being observed. If they didn't care a bit, they could do nothing. After all, it's not as if there are unions who would fight for it.
It's not perfect but I do respect the leadership of this country. If it were not for such a benevolent and sensible ruler, Qatar would not be the safe place it is and we would all have been kicked out years ago. We all have some share in the riches of this country in our own way.