This is Walter M. Miller's “Crucifixus Etiam”.
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.”
Miller, Walter M. – “Crucifixus Etiam” (1953) - Doomsayer Press
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 story online here