That was the moment when I first sensed she was the villain. She knows the construction of the line involves uncertain and untested safety conditions, so she won't "force" anyone to work there, because she doesn't need to: she knows the workers need the job anyway, and they have actually very little choice. You can clearly feel the implied manipulation behind her statement.

I remember reading that section entirely differently, but it's been a few years and so my memory might be off. I got the feel that people were jockeying for the honor of being on the first run, because it was exciting, and so employing force to find workers is entirely unnecessary.