Ruhetag in the states?

During our recent roadtrip, Chaz speculated that perhaps we may soon see the reemergence of euro-style Sundays where retail would have to close one day, in order to both cut business costs, as well as to resolve staffing issues if staff can't afford to come to work 7 days a week.  His sister has already started doing the 4-day work week discussed here. It's no longer out of the question, and I suspect may come at us quickly.