A few generations ago kids worked at 10, there were no weekly limit, no weekends, no vacations, no security, no form of compensation if you get injured/die while working, no pension, no sick leave &c.
In first world countries we never worked so little for so much comfort.
> By the act of 1892 one day in the week, not necessarily Sunday, had to be given for entire absence from work, in addition to eight recognized annual holidays
> Children may not be employed in industrial work before 12 years, and then only 8 hours a day at work
> The first attempt to secure legislation regulating factory employment related to the hours of labour, which were very long - from twelve to thirteen hours a day.
> Boys of 13 may be employed in certain work underground, but under 16 may not be employed more than 8 hours in the 24 from bank to bank. A law of 1905 provided for miners a 9 hours' day and in 1907 an 8 hours' day from the foot of the entrance gallery back to the same point.