We're really focused on health and safety aspects of this job - in a repetitive stress sense, these jobs are much more dangerous than many people imagine they would be and people end up with lifelong injuries.
Generally, regulators seem to be moving in this direction as well. The EU has introduced new regulations on the total amount of weight someone can move in a shift, and the Dutch government has mandated that baggage handling move away from manual processes like this in the near future.