Weekends aren't legally mandated by government. The workweek is negotiated, without bringing the government into the mix. I should know, because in my profession, 50-60 hour weeks without overtime pay are standard.
The problem people have with the labor movement is that it's gotten too totalitarian- using the government to tell businesses and workers exactly the kinds of contracts they're allowed to make. Often, this is to the detriment of the workers as well as the businesses, such as when minimum wage laws lead to the firing of low-wage workers that cannot be afforded at minimum wage.
Shut up ! how about the genocide of both the native americans and african americans you dunce how about that all together probably be more than what stalin did. oh and how about the slave trade the indian removal act or the trail of tears, think before you say you dunce.