If I had 5 minutes as ruler of the world (yup, still strong child in me

) nobody except must (like emergencies and like, and to them work would be organized to satisfy them) would work at saturday and sunday. People MUST have time for their famillies, friends and for themselves of course...
If you wonder for example when to buy food, clothing and else if shops wouldn't work at weekends, well, work would be organized so people will have free time during working week to buy what they need. I mean, all work can be done in 5 to 8 hours during working days, there is no real need to work 9, 10 or 15 hours per day.
Of course only if we (human kind) choose that we (people) are more important than money (Utopia I know...

)