There are several ways it’s presented. But anything other than four 8-hour days with the same salary is just trying to pander to the rich people to make it more appealing to them. I personally would feel pretty terrible having to work 10 hours a day, and it would negate the positives of having an extra day off. It’d work for some people but it wouldn’t be a real win for the working class as it would be the same number of working hours even though productivity has skyrocketed in the previous decades