The union is you. The response will be as severe as you are willing to make it.
Stop standing around waiting for others to tell you what to do. Everybody has the tools to impact the operation. So pick them up and use them.
Stop helping out. Let the pieces crumble instead of intervening to fix all their continual f-ups. Don’t suggest solutions to engineering. Don’t intervene when you see their plans heading straight to a cliff. Halt the operation if procedure is not followed. If everyone did this we would have an enforced 25% pay rise next week.