The working conditions of (sub)contractors and independant workers and the corresponding issue of their heath and safety at work have always been of major concern. See for example:
Article Assessment of exposure during catalyst handling in the chemi...
orArticle Exposure of Contractors to Chemical Pollutants During the Ma...
The issue is growing with development of the gig economy. Companies like Uber, Lyft or other do not consider they have any responsabilities in the working conditions of the drivers or other workers. These latter are supposed to implement themselves that question, which generally happens to be impossible as described in these papers for example:
Book Preview: Platformisation 2027
orConference Paper Regulating the OSH impact on online platform economy (OSHA S...
Do some researchers here have some data about the way these things are treated all around the world?