That doesn't factor in the social pressure to take at least as much vacation as your immediate supervisor. Not doing so can reasonably be assumed to be seen as

That doesn't factor in the social pressure to take at least as much vacation as your immediate supervisor. Not doing so can reasonably be assumed to be seen as a problem by the supervisor, since they demonstrably think that that level of vacation is important for their well-being. Since no person* can work every day of the year for more than (1? 2?) years, and since supervisors will presumably feel they have greater job safety, over time a more reasonable baseline will be established by people higher up in the company, allowing all to have some time off. There's also the question of how one is perceived by co-workers, since deliberately taking slightly less vacation than others in order to benefit from a perception of being a hard worker carries a risk: you are in effect deceiving others about your intentions. Since the easiest way to not be perceived as deceptive is not to deceive, avoiding the risk of harm to the level of trust others place in you would argue for taking the same, not slightly less, vacation as them. *Not counting outliers