The question is not whether workers mind being killed or injured. The question is which they mind more - lower pay, unemployment, or an increased risk of injury or death.
There are many things we could do to reduce your first world risk of death - mandate that all cars are have a mechanically enforced speed limit of 20mph, for example. We choose not to. Why?
That argument presupposes that people are not facing a real risk of starving to death if they are unemployed. I am not sure that is something that can be assumed.
When there is a gun pointed at your head, you do not have a real choice.
There are many things we could do to reduce your first world risk of death - mandate that all cars are have a mechanically enforced speed limit of 20mph, for example. We choose not to. Why?