I donīt have my contract at hand but as I can recall:
i) My contract was signed by the agency, not KAL and not according the korean law. We are not KAL employees thats why we donīt have their benefits according to the local labour law ( such as End of Service bonus or health care). Ask those former expat pilots that tried to sue the company for this reason. They paid a bunch of money to a lawyer and results?
ii) One of the first contract clauses states that we will never join any industrial action, maybe it can be named as "scabs".
Regards