Political Scab
Either a union or non-union employee who crosses the imaginary picket line and votes for a political party promoting job related policies contrary to the employee’s personal financial interests. Commonly associated with blustering, expressions of faux-patriotism, and numerous other questionable personality characteristics.
The airline captain is a political scab, more interested in voting for gun, security, and military policies than voting for the political party that will further his own labor contract provisions.