I believe the idea is to shorten work weeks to force the capitalists to hire more laborers in the US. If the capitalist could move their production to Asia, they would have done it already.
Most USian workers don’t work in factories producing tangible commodities. They work in restaurants, accounting firms, and other types of service work that can’t be easily exported. Again, if the capitalists could export this labor easily, they would do it with or without a shortened week.
Only excited because one of these July 4 holidays will be the last one the empire celebrates.