Well, because of organisational biases. There are principal agent problems dotted throughout most businesses larger than a single room, and people care more abo

Well, because of organisational biases. There are principal agent problems dotted throughout most businesses larger than a single room, and people care more about looking good than being theoretically optimal, and this is recursive. And however bad you think this problem is - it's probably worse. Robin Hanson and Eliezer Yudkowsky have both written good stuff on this subject.