Final answer:
Finch expresses concern about safety on the job in relation to the strike.
Step-by-step explanation:
Finch expresses concern about safety on the job in relation to the strike. In the given passage, it is mentioned that the telegraphers were fighting for better working conditions, higher pay, shorter hours, and less work. Safety on the job falls under the category of better working conditions, and Finch's concern about it suggests that the working conditions were not satisfactory during the strike.