then "workers" will want to go out on their newly-free Friday and have a coffee and some lunch with friends...and those workers better damn well be there to serve them!
I'm not an advocate of 4-day work week, but this argument always makes me laugh.
What is it you think happens on Saturday? Do you think those baristas are working 7 days/week?
That's how Sundays work in some European countries - businesses, shops and some restaurants are closed, with a few exceptions (depending on the country ofc). Doesn't automatically mean one can't spend the time well.
It'd be nice if I could go out to eat on Fridays, but if everything just shut down on Friday I'd personally be good with that, too - I can imagine a world where nearly everything except maybe emergency services just took a day off. I would welcome the guilt-free opportunity to do absolutely nothing "productive" for one day a week.
That's Sunday in places where this is normal, we could just extend that
Ask a German or a Chilean how they spend their Sunday
It's not that everything closes, Malls open (Less hours) Chain Stores open and anything medium to large does, still, enough places close to make a difference, and also make the incentive of paying more to people working those days
Service company employees tend to work in shifts and not every employee works every shift, therefore they’re able to cover every day and shift - but with different people. Look at the people at your coffee shop sometimes and you’ll notice they’re not always the same people.