From your link, Although there were initial successes in achieving an eight-hour day in New Zealand and by the Australian labour movement for skilled workers i

From your link, Although there were initial successes in achieving an eight-hour day in New Zealand and by the Australian labour movement for skilled workers in the 1840s and 1850s, most employed people had to wait to the early and mid twentieth century for the condition to be widely achieved through the industrialized world through legislative action. [And many other countries followed the same trajectory.] How come? I'll take a guess: because it was only made possible in practice in the 20th century by a sufficient increase in productivity, mainly through automation but also economies of scale. And as the process continued, those jobs went away completely. https://en.wikipedia.org/wiki/Post_hoc_ergo_propter_hoc https://en.wikipedia.org/wiki/Post_hoc_ergo_propter_hoc