Wage parity? Have you ever seen what these longshoremen have to do??? These have become very technical jobs that have to run like an efficient machine (and hope the machines don't break down)... Before you begrudge their income, try doing the job (and know I'm not a longshoreman or have any relatives who are, but I've actually seen what they do).
*ping* to an example thread.
Don't miss post #62.
I have and it's not worth $150K per year.