Duh, work isn't really about creating value. There's been at least one study showing that workers are actually most productive with 25-30 hour workweeks, with knowledge workers having even lower hours of productivity per week. It's about showing off to everyone how hardworking you are.
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You're messing with me! You're messing with me, aren't you!?
You're making fun of me, aren't you!? Aren't you!? You definitely are! I'll murder you!