Oh I wasn't thinking of selfishness in this situation (I didn't use that word, but i was thinking of how purely rational economic actors would act), merely that

Oh I wasn't thinking of selfishness in this situation (I didn't use that word, but i was thinking of how purely rational economic actors would act), merely that there is a subconscious incentive to act one way. Of course you are right, interviews serve as a filter, one wants the newcomer to increase the output of the team, not decrease it ;-)