Why doesn't the U.S. have mandatory vacation time?

[DannyCacoilo]

In most European countries, everybody is entitled to 4 weeks vacation. In France, they get 5 weeks! To get 4 weeks vacation in the U.S., you have to work like 5 plus years at your current employer!

http://www.mercer.com/press-releases/1360620

http://www.cepr.net/index.php/publications/reports/no-vacation-nation/