OK, so let's really do this, even though the other commenter got downvoted into oblivion just for daring to check the math.

The claim is they make 75.91/hr when in the crane, 73.91 when not. Let's say they spend 6 hours a day in the crane, 2 hours not in the crane; that's 603.28/day. Five days a week is 3,016.40. 52 weeks a year would be 156,852.80.

So we're at $156,852.80/year from 8-hour days of work. We need to somehow get to "half a million". By which I mean we need to come up with $343,147.20 in overtime. The quote doesn't say what the overtime rate is, but traditionally it's time and a half; At a behind-the-crane rate of $75.91, overtime would be $113.86/hour. The engineer would then need to work "only" 3,013 hours of overtime a year in order to hit that "half a million" target. Or 2,135 hours of overtime a year in order to hit the $400k another commenter suggests below.

There are 8,760 total hours in a (non-leap) year and we've already used 2,080 of them accounting for 8-hour weekday shifts. So our engineer has 6,680 hours in the year left in which to work either 3,013 or 2,135 hours of overtime so we can bash him for making too much money. If he works an 8-hour shift every Saturday and every Sunday at the overtime rate, that only gets us 832 hours of overtime. We still need to find between 1,303 and 2,181 additional hours of overtime. That's an additional 3.5 - 6 hours per day every day for the year.

So... "many union members earn half a million dollars a year". To get to that number, at the quoted wages, they would have to be working 14-hour shifts every day. Not "every week day with two week's vacation". 14 hours every day: 7 days a week, 365 days a year. To get to the $400,000 estimate the comment below thinks is reasonable, they'd only need to work 11.5 hours a day all 365 days of the year. And that's probably a low estimate: I got that number by assuming the engineer spends 6 hours of every working weekday 8-hour shift behind the crane at the higher rate, and 100% of overtime hours behind the crane at the higher rate. If he's spending any more than 2 hours per weekday not behind the crane he needs to work even more hours since he's paid a lower rate then.

I hope nobody actually believes that these guys are genuinely working 11-14 hours a day, 365 days a year, or that if they are it would be wrong to massively compensate them for it.

Of course, someone will point out that I didn't account for the $32.50/hour in "benefits". But how can I? What does that mean? How many jobs have you had where you said "oh, my rate is low but I also count an hourly benefit amount as part of my wages"? Do you genuinely, truly, honestly and actively make sure you include the cost of any employer matching on your health insurance or 401(k) as dollar value and lump it into your salary? I know I don't.

But let's run with it anyway. Let's suppose the engineer gets 100% of his health plan covered by these "benefits", and what's more let's go high on it and assume that his health plan costs $5,000/month. If we only have him work 8-hour shifts 7 days a week we still need to make up a lot of money out of overtime or non-health-plan benefits:

weekday wage = (75.91 * 6) + (73.91 * 2) = 603.28

weekend wage = (75.91 * 1.5) * 16 (hours in two 8-hour shifts) = 1,821.84

Full week = 5 * weekday + weekend = 4,838.24

Full year of 8-hour shifts 7 days a week = 52 * 4,838.24 = 251,588.48

Add in $60,000 worth of health insurance = $311,588.48

To hit the "half a million" we still need to find nearly another $200,000. Specifically, we still need to find him 1,655 hours of overtime at this point. That's 4.5 hours a day in a 365-day year, so we're at 12.5-hour shifts, 365 days a year, to hit $500,000 in compensation.

A 401(k) doesn't help since his max contribution to that is $18,000/year, which is peanuts compared to the gap we need to make up to get him to $500,000.

But at this point I think we can safely say that something is very fishy with what you've quoted. And to reference my other comment, the reason this engineer isn't hanging out with other millionaires is that he can't because he spends 12.5 hours a day, all 365 days of the year, at work in order to get to that "half a million" wage you're attributing to him.

(except of course you know that the crane operators aren't really doing that, but that would sink the whole story...)