As AlanScott alludes to above, I don't really think "lazy" is part of this.
The opening vamp of the show (i.e. the vamp that begins the song "Company" - the rhythm of which continues throughout the entire song in various ways) is meant to be a musical imitation of a busy signal - and of course on the original recording this is made literally clear. When Marta asks Bobby what he thinks the pulse of the city is, he responds "a busy signal?" And, of course you have the busy, restless feeling of the accompaniment to "Another 100 People" to boot.
Not lazy - busy. Too busy to even answer the phone call. Which is why the service is there to pick it up. ;-)
