Cannibals at hire

Microsoft recently hired several cannibals in the interest of cultural diversity.

"You are all part of our team now," said the HR rep during the welcome
briefing. "You get all the usual benefits and you can go to the cafeteria
for something to eat, but please don't eat any of the other employees." The
cannibals promised they would not.

Four weeks later, their boss remarked, "You're all working very hard and
I'm satisfied with you. However, one of our shipping clerks has
disappeared. Do any of you know what happened to her?"

The cannibals all shook their heads no. After the boss left, the leader of
the cannibals said to the others, "Which one of you idiots ate the shipping
clerk?"

A hand rose hesitantly, to which the leader of the cannibals continued,
"You fool, for 4 weeks we've been eating Managers and no one noticed
anything, but Noooooo, you had to go and eat someone who actually does
something!"