Maybe in the rich EU countries, certainly not in the US ever let alone the third world. IMO the 9-5 is part of the civil religion just as much as voting and gun rights. Maybe some professions will get away with benefiting from this but certainly not on a large scale.

Given the choice between mass unemployment, poverty and hunger all risking mass revolt vs simply cutting hours by 1/3 and giving everyone a job and a salary, the choice is obvious, pick the one that will make you the most money right now.

Capitalists will never do what is necessary to save capitalism which is why it is doomed, it does mean we will all suffer more as a result though.