This is Walter M. Miller's “[Crucifixus Etiam][1]”. 

Troffies are mentioned in the review below.

> Desperate to find some sort of meaning for the work he is doing, Manue
> goes to one of the “troffies” (for atrophy, the older workers who have
> given up any hope of returning to Earth), who explains it to him as a
> problem of overproduction and underconsumption:
> 
> *“So, it’s either cut production or find an outlet. Mars is an outlet
> for surplus energies, manpower, money. Mars Project keeps money
> turning over, keeps everything turning over. Economist told me that.
> Said if the Project folded, surplus would pile up-big depression on
> Earth.”*

> <sup><sub>[Miller, Walter M. – “Crucifixus Etiam” (1953) - Doomsayer Press][2]</sup></sub>

and in the story itself.

> *Earth chalice, Earth blood, Earth God,  Earth worshipers—with plastic
> tubes in their chests and a great sickness in their hearts.*
> 
> *He went away saddened. There was no faith here. Faith needed familiar
> surroundings, the props of culture. Here there were only swinging
> picks and rumbling machinery and sloshing concrete and **the clatter of
> tools and the wheezing of troffies.** Why? For five dollars an hour and
> keep?*



You can read the majority of it online [here](https://books.google.co.uk/books?id=BLXjdltdDh4C&pg=PT40&lpg=PT40&dq=%22hung+his+face+in+his+hands+and+cursed+softly%22&source=bl&ots=6QIRnB-tIc&sig=W1crLmyZW0kXapT0kZ1RNN-6A_w&hl=en&sa=X&ved=0ahUKEwiIvay4y-PSAhVBKcAKHa3fDPwQ6AEIGjAA#v=onepage&q=Crucifixus%20Etiam&f=false)

  [1]: http://www.isfdb.org/cgi-bin/title.cgi?55922
  [2]: https://doomsdayer.wordpress.com/2013/06/18/miller-walter-m-crucifixus-etiam-1953/