When talking about this, I usually mention the utility cost vs straight cost. Not all hours are created equal! How many employees are as productive on friday as

When talking about this, I usually mention the utility cost vs straight cost. Not all hours are created equal! How many employees are as productive on friday as they are on tuesday? The employer may be losing 20% of the hours, but maybe only 10% of the productivity. I could see this actually breaking even, as employees rested from their three-day weekends become ever more productive. And it's a tremendous hiring and retention perk, at least as long as it's not standard practice. "Work for us, and you get three day weekends every week!" And that turns into "So, recruiter, does this new gig you're trying to hire me for offer a four day workweek? No? Well okay then, bye."