Just to play devil's advocate
this is an average, which is biased by high numbers (a few w/ big numbers pulls it way up)
What is the median?
What is the median for similar machinists today, multiplied by 5 years of inflation? What is the difference is level of specialization, skill, experience etc to be doing this job for an aerespace company like Boeing? I'm gonna guess they don't take just any ol' dude.
In other news... I'm no fan of unions, but I do like seeing specialized tradesmen getting paid well.