2 is correct. The democracy is that of multiple workers, so workers is plural. Because of that, the apostrophe applies to the plural form and is therefore after the s. If the democracy was the "property" of a single worker, then it would be that worker's democracy.
Depending on context, consider "gofer,' "handyman," and "versatile/all-around worker." gofer (or gopher): a person whose job is to do various small and usually boring jobs for other people.
@Yosef Baskin Regarding the application's question, I just used co-worker. However, for the term "volunteer" itself, is there an equivalent term that essentially means "co-volunteer"? It seems like "co-volunteer" is the obvious answer, but I was not able to find validation for that term.
5 In the UK we have shop assistant but there are more specific terms like checkout girl and the possibly pejorative shelf-stacker, as well as the general shopworker, retail worker and so on. The best word to use probably depends on what your person actually does.
Not one word, but one generally refers to an employee who works at geographically different location than the rest of the team as a field-office worker, i.e., a person who works in a field office or in the field. From Lexico: field office: a subsidiary office located in the field, away from a main office or headquarters in the field: (of an employee) away from the home office; working while ...
For example, imagine a worker in a widget factory who is responsible for checking if all the widgets on a conveyor belt are well-made. This worker is successful in their job 99% of the time. However,