We are already productive enough to have a shorter work week and more leisure, anyone saying no has specific incentives to not support it (either via financial gain from the capital accumulation funnel or work bound to their identity).
https://hn.algolia.com/?q=4+day+week
(we get there eventually with structural demographics, it’ll just take longer)
Eventually a new startup will replace your large inefficient employer with people working 10% of their time.