> There is plenty of evidence that long shifts affect cognitive functioning[1]
That study attributes much of the deficit to interrupting circadian rhythms, which is the thing that isn't required with 12 hour shifts, because the other 12 hours a day can contain a consistent 8 hour block for sleeping at night. Whereas the alternative where you bring on a second shift with different workers does exactly that, because now the second shift is e.g 5PM-1AM and by the time those workers go home, eat a meal and get ready for bed, they're sleeping in the daylight. Or if the business is one that operates 24 hours, using 8 hours shifts causes there to be two night shifts instead of one.
> Secondly, even if someone was to show that some workers are still able to function well, make good decisions and not make manufacturing errors that would likely impact safety after 12 hours it might still be reasonable to not have such long shifts because the length for some workers would tend to compell all workers (including some for whom that shift length would be too much) to work the long shift if they want to keep their job.
This is a fully generic argument. Maybe some workers have heart disease and shouldn't do a job that involves lifting. Does that mean no one should be able to do it? People over 65 disproportionately suffer from various forms of dementia. Should they be prohibited from working if they want to, even the ones who are healthy?
Most jobs don't use 12 hour shifts because they don't want to pay overtime, so it's hard to see how anyone who prefers a job with 8 hour shifts could be forced to take one of those instead of the majority of other jobs that use 8 hour shifts.
> There is lots of research associating long shifts with chronic health problems[2] and poor wellbeing for example[3] .
We need to be extremely careful with correlational studies. There is evidence that all kinds of negative outcomes are associated with poverty, and the people working long hours are typically doing it because they don't have enough money. What happens when you say they can't work that much and make them even poorer?
That study attributes much of the deficit to interrupting circadian rhythms, which is the thing that isn't required with 12 hour shifts, because the other 12 hours a day can contain a consistent 8 hour block for sleeping at night. Whereas the alternative where you bring on a second shift with different workers does exactly that, because now the second shift is e.g 5PM-1AM and by the time those workers go home, eat a meal and get ready for bed, they're sleeping in the daylight. Or if the business is one that operates 24 hours, using 8 hours shifts causes there to be two night shifts instead of one.
> Secondly, even if someone was to show that some workers are still able to function well, make good decisions and not make manufacturing errors that would likely impact safety after 12 hours it might still be reasonable to not have such long shifts because the length for some workers would tend to compell all workers (including some for whom that shift length would be too much) to work the long shift if they want to keep their job.
This is a fully generic argument. Maybe some workers have heart disease and shouldn't do a job that involves lifting. Does that mean no one should be able to do it? People over 65 disproportionately suffer from various forms of dementia. Should they be prohibited from working if they want to, even the ones who are healthy?
Most jobs don't use 12 hour shifts because they don't want to pay overtime, so it's hard to see how anyone who prefers a job with 8 hour shifts could be forced to take one of those instead of the majority of other jobs that use 8 hour shifts.
> There is lots of research associating long shifts with chronic health problems[2] and poor wellbeing for example[3] .
We need to be extremely careful with correlational studies. There is evidence that all kinds of negative outcomes are associated with poverty, and the people working long hours are typically doing it because they don't have enough money. What happens when you say they can't work that much and make them even poorer?