Generally not. There are some rules for people who work on an hourly basis, but I think those vary by state. For some jobs there are also safety regulations. E.g., airline pilots and truck drivers. And many union contracts have substantial restrictions.
I think here we rely more on a liquid labor market than on government regulation to encourage sane working conditions. Which definitely has its drawbacks, but has the upside of not indulging the "lump of labor" fallacy: http://en.wikipedia.org/wiki/Lump_of_labour_fallacy
I think here we rely more on a liquid labor market than on government regulation to encourage sane working conditions. Which definitely has its drawbacks, but has the upside of not indulging the "lump of labor" fallacy: http://en.wikipedia.org/wiki/Lump_of_labour_fallacy