This is both a collective action problem (people not using the right gear will be faster and cheaper than those with, meaning bad behavior outcompetes good) and an information asymmetry problem - workers are usually not fully aware of the problems they're creating for themselves.
Also people don't think they care. In high school one kid told me 'I don't want anyone to wipe my butt when i'm old, so I'm going to commit suicide at 50, therefore my smoking isn't going to harm me'. He is now approaching 50, I wonder if he still thinks that, but I haven't seen him since.
