Given that particular strike was against in part automation it was that they wanted their port to become less competitive and eventually be destroyed by ports employing automation and not even jobs left for their kids to fix or engineer the machines.
A small amount of it does go to your 401(k), yes. A much larger amount goes to executives, largely through stock-based compensation, and much wealthier investors.
You are on a site for venture capitalists (i.e. company owners), tech startup founders (i.e. company owners), and tech startup / FAANG employees whose TC has a large component of stock (i.e. company owners). Just a wild guess but they probably don't see a problem with money going to the company owners.