Wew, 10% per year? That's actually pretty solid, if I'm not missing anything. And having a good deal that lasts THIS long actually flips the normal shitty status quo of multi-year contracts on its' head, now they won't need to go to the effort of big strikes for a good few years while they've got these fair wage increases locked in.
To be pedantic, it’s 100%–(162%)^(1/6)=8.4% per year. Still a great number, until you consider that their wages have been pretty stagnant for years.
Edit:
That may sound like an extreme demand, but workers would point out that wages for veteran dockworkers have increased 11% since the start of the last six-year contract, while inflation has jumped 24% in the same period.
I'd also like to compare that to the average American. I suspect most people have done even worse than 11% in the last six years, which is why they don't support these things. It's not 'fair' they won't get a similar treatment. It's sad how many don't want others to succeed because they are in a bad place.
People are so short-sighted, organized labor succeeding helps all labor get more, even if they are not represented. I was in CWA for years but even after I left the union their bargaining successes typically translated into wage increases for me. So even from a purely self-interested position all workers should support union actions and celebrate union successes.