You've been downvoted, but I think you're right. These workers have no sense of the damage they could be doing -- if a package gets lost, for example, because

You've been downvoted, but I think you're right. These workers have no sense of the damage they could be doing -- if a package gets lost, for example, because of their error. They need to be made to feel it personally somehow. At the very least they should know that if something goes wrong because of their error and the business is held liable, they will be fired. If there's no way to know which worker committed the error, maybe that's the first thing that should be fixed. Bonuses for error-free performance are also a good idea. I'm all for treating workers well, but it goes both ways: the workers also need to treat the job well.