This is more or less the case with most labor and service industry jobs. If you were to say, "I'll let you out of this concentration camp if a week from now yo

This is more or less the case with most labor and service industry jobs. If you were to say, "I'll let you out of this concentration camp if a week from now you become a top-1% waiter, a top-1% bus-boy, a top-1% heavy thing mover", etc then at least half of all (healthy) people could do it. As a result the work is commoditized, doesn't pay much, and doesn't come with much social respect. Employers hire agencies to hire laborers to fill quotas. They don't much care whom they're hiring as long as they show up on time, sober, and don't cause trouble while working. The employee's thoughts on process optimization are to be kept to themselves.