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Apple reduces raises given to retail employees after weak iPhone quarter
(appleinsider.com)
This is a most excellent place for technology news and articles.
My dude, essential is an antonym for expendable. Literally opposites. By definitions of both words, something cannot by both expendable and essential. But logic aside, calling a person essential to the point of denying their own safety to perform their job, but saying they can be replaced at any minute is frankly cruel.