yytz.
I don’t know halachos. But I think the farm workers are only permitted to eat pending a few conditions, not at all possible by office workers.
Regarding what’s permitted by office employees needs to be asked by a competent Rav, Dayan – hilchos choshen mishpat. I think a lot has to do with the general order, also what the employer would be makpid. Again, I’m not a Rabbi by any stretch of imagination, ask a real one.