here's the additional lyrics to the album version of work for the working man
according to our senior member "wrath mania" (thanks for the pm !):

Oh, the postman always brings the mail
Through rain or snow or sleet or hail
He'll work and work the whole day through
To get your letters safe to you

Oh, a fireman is brave it's said
His engine is a shiny red
If there's a fire anywhere about
Well, He'll be sure to put it out

say hey ho ! hey ho !
say hey ho ! hey ho !
say hey ho ! hey ho !