I was c/c for 35 years+ and in all that time I never saw anything implemented as a result of a one off concession even for commercial reasons that were for the benefit of the airline.
Hi JL,
Were you not around when the BA CC Unions agreed to 'help' the airline by temporarily removing a crew member from all services worldwide just after 9/11? That crew member was never re-instated even when loads returned to pre 9/11 levels.