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And the really stupid thing is, that it doesn't even work. Doing that much overtime just means you are making more mistakes which you will have to fix the next day, completely negating the overtime productivity and usually even more. I once managed to convince an employer that structural overtime wasn't worth it by showing him (the next day) some mistakes I made by being too tired. Subsequently he checked with some of my colleagues and found the same problem. After that, structural overtime was not allowed anymore instead of promoted.