Lets assume it costs more to make a job ethical (fewer hours, higher pay etc) - otherwise why not do it now? This means higher prices for consumers, so they now buy fewer products. This means less products need to be produced, so fewer persons are employed in making these ethical products. What happens with the workers who are now redundant?

Concretely, if an iPhone is replaced on average every other year but goes up 30% to the the ePhone (ethical phone) it is now only replaced every 3 years. This means fewer ephones are produced, which means that roughly 1/3 of the workforce is no longer required. What are those 1/3 to do?