If its not in your job description and no one specifically asks you to help out, anything that is not your responsibility or business is just that, not your responsibility or business. Whether to stay late or take up extra tasks that will ultimately help any co-workers as a team is up to an individual. Helping out beyond responsibilities of a persons job description does not guarantee that one will be appreciated for what they do or rewarded. Such an action could be considered a heroic and honorable deed and might lead to something good eventually. The specific words "could," "considered," "might" and "eventually" in this last sentence present a weak argument however, "Such an action would be a heroic and honorable deed and lead to something good." would denote no room for doubt in this statement. When events come down to the scenario that an individual has done all they can short of breaking policies in the work place to help out of their own free will and voillition and can not continue to be a hero any longer because doing such would break policy, then it is simply time to bring such a case to the attention of whoever is in charge because that would then be their responsibility.
It is all too easy to make statements about whoever is in charge not being responsible for the tasks defined in their job descriptions. When the manager, supervisor or leader fails to manage their responsibilities everyone suffers including that person in a leadership position. two good examples of what happens when such a situation occurs are waiting and office space. In order to avoid arson, unsatisfied customers, disgruntled workers, stealing, mutiny and any other examples of disruption within the workplace possible, it is important for everyone in a team whether the leader or simply a worker to bear their load of the responsibilities.
Mainly though if it is not in an individuals job description of responsibilities then whether they should be concerned about it is ultimately they're choice and they have the right by law to say yes or no.
It is all too easy to make statements about whoever is in charge not being responsible for the tasks defined in their job descriptions. When the manager, supervisor or leader fails to manage their responsibilities everyone suffers including that person in a leadership position. two good examples of what happens when such a situation occurs are waiting and office space. In order to avoid arson, unsatisfied customers, disgruntled workers, stealing, mutiny and any other examples of disruption within the workplace possible, it is important for everyone in a team whether the leader or simply a worker to bear their load of the responsibilities.
Mainly though if it is not in an individuals job description of responsibilities then whether they should be concerned about it is ultimately they're choice and they have the right by law to say yes or no.