Conversely, there are offices where someone "not being present" can shut down the productivity of the entire firm. People are paid to "be available" as well as

Conversely, there are offices where someone "not being present" can shut down the productivity of the entire firm. People are paid to "be available" as well as to do tasks. The importance of "availability" on "task performance" is not imaginary--witness how computatuional hardware shows performance variation based on cache architecture.