Why would an organized labor force try to sabotage the company they work for? If their company goes bankrupt, they all lose their jobs. I've yet to see a union

Why would an organized labor force try to sabotage the company they work for? If their company goes bankrupt, they all lose their jobs. I've yet to see a union contract that guarantees the type of golden parachutes that executives routinely line up for themselves (and only for themselves) when their firm goes bust or they start to run for the door. In general, when a company fails, the rank and file have to find new jobs. Executives, on the other hand, never have to work again. We observe this trend over and over again (unionized workforce or not). Given this trend, which side is more likely to be the one that blows the whole thing up?