An H-1B told me her husband was severely abused at other jobs. It sounded really bad what they were doing to him. However, the big government contractor I worked for appeared to treat them no differently, as far as working hours, than anyone else. Pay may well have been another matter. Now that I think about it, two of them I worked closely with had M.S. degrees in engineering from good schools and were at a low grade level. They were young, though.