Canadian billionaire Kevin O’Leary has slammed the four-day workweek as ‘the stupidest idea’ he’s encountered, despite acknowledging shifts in work post-pandemic. He argues that productivity, not fixed hours, matters, with 40% of his staff working remotely. O’Leary also advised young professionals to curb daily spending on coffee and sandwiches, urging them to save and invest instead for long-term wealth.