In Japan(I'm not sure the case in Korea does), salary man means simply the person(people) receiving salary.
I'm not sure how salary man is used in the west but in Japanese at least not used as the additional meaning such as the loyalty to the company, respect in a high position.
We also use other words <<deletion>>; however, when we use salary man, it emphasizes the point that the man working in office or in company receives the monthly paychecks.
So in my opinion, that word can be translated to businessman(men), a (office) worker(s) including white-collar worker(s) and so on.