Mexican billionaire wants to slim down the workweek by Ben Geier @FortuneMagazine July 21, 2014, 9:08 AM EST E-mail Tweet Facebook Google Plus Linkedin Share icons Thank God it’s … Wednesday? That’s what workers would be saying if Carlos Slim had anything to do with it. The Mexican billionaire thinks that a three-day workweek is preferable to the current five-day structure, according to an article in the Financial Times. Speaking at a conference in Paraguay, Slim shared his vision for a new work structure, saying that “people are going to have to work for more years, until they are 70 or 75, and just work three days a week – perhaps 11 hours a day.” Of course, Slim isn’t the first to propose changing the traditional workweek. Online education company Treehouse has a four-day workweek. The state of Utah’s public employees work four 10-hour days a week, to cut down on infrastructure and transportation costs on Fridays. Slim’s fixed-line phone company in Mexico allows retirement-age employees to continue working four days a week on a full salary.