I wish they had gone into what they meant by paid by the shift. Does that mean they got to go home early if the work was done? They had to stay later if it wasn't? I'm not sure that paying for 8 hours is much incentive, and forcing people to work more for the same money seems like it would be a recipe for disaster. Giving a reward for getting through the mail faster by getting to go home early send like a pretty awesome reward though.