I have no horse in this race. But as a counterpoint, pretty much everything in New York is more expensive due to heavy unionisation, particularly around construction and public services.
There's a lot of other reasons stuff is expensive in NY. Europe is heavily unionized and somehow they still manage to build subways at a lot less than $1 billion per mile.
This a perfect example of grass being greener on the other side of the fence ;) In some European countries I know of, unions are solely responsible for forcing the government hands into things like keeping around and subsidising beyond any sense and belief a dirty energy sources (coal mines and power plants for example) resulting in air quality killing more people than car accidents every year. Those unions won't stop at anything and are ready to and have in past organising violent riots on streets, until everyone around surrenders to their demands.
My understanding is that the if-anything-heavier-unionized EU isn't experiencing the same rapid growth in (especially public) construction costs as the US has been for some time—still faster than inflation, but lower than would be explained by just PPP adjustments or COL vs. the US. Unions may not be helping but there's something else causing runaway cost growth in US public sector construction, in particular.
There are “nippers” to watch material being moved around and “hog house tenders” to supervise the break room. Each crane must have an “oiler,” a relic of a time when they needed frequent lubrication. Standby electricians and plumbers are to be on hand at all times, as is at least one “master mechanic.” Generators and elevators must have their own operators, even though they are automatic. An extra person is required to be present for all concrete pumping, steam fitting, sheet metal work and other tasks.
In New York, “underground construction employs approximately four times the number of personnel as in similar jobs in Asia, Australia, or Europe,” according to an internal report by Arup, a consulting firm that worked on the Second Avenue subway and many similar projects around the world.
The "oiler" thing sounds stupid, sure, and overstaffing in general is a fair concern. But, devil's advocate, how much time and money would be wasted if an essential machine broke and there wasn't a mechanic standing around ready to spring into action? How many people would be seriously or fatally injured in a year without a helper on those "An extra person is required..." tasks?
I don't know the answers. Some of them legitimately may be useless sinecures, but it's worth keeping in mind that what looks like redundant waste is sometimes an important guard against some kind of failure. Just because it isn't always used doesn't mean that it's not worthwhile.
The article directly compares the NY subway project to a french one, and finds that it was cheaper and had a quarter of the staffing. So since we've established time and money is not being wasted by not employing 4x the people, all you have to do is check and see if French public construction is more dangerous than the US, and you'll know if elevator operators and underground break room guards are important safety roles.
In the public sector, unions and engineering firms/management contractors are not at odds as they are in the private sector, they collaborate to rip off the public.
==it's worth keeping in mind that what looks like redundant waste is sometimes an important guard against some kind of failure. Just because it isn't always used doesn't mean that it's not worthwhile.==
Even more likely is that the redundancy exists because of something bad that happened in the past. That is how most regulation comes into existence.
I have no horse in this race. But as a counterpoint, pretty much everything in New York is more expensive due to heavy unionisation, particularly around construction and public services.