I mean I'm not sure if linking is necessary but Henry Ford is widely credited for inventing the 5-day work week (which he reduced from 6 days without reducing pay).
Health insurance attached to your job is more complex, as the first major instances were in Germany in the 1800's, however generally it was a result of wage controls during WWII. Private companies weren't able to compete on wages, so they started adding benefits.
Unions do not progress employee benefits, they're hostile political organizations inside companies, and once you understand that everything else makes sense. If unions attracted top talent than companies who wanted top talent would enact them; and if they improved wages then the best wages would be union jobs. In private industry, this is essentially never the case.
Health insurance attached to your job is more complex, as the first major instances were in Germany in the 1800's, however generally it was a result of wage controls during WWII. Private companies weren't able to compete on wages, so they started adding benefits.
Unions do not progress employee benefits, they're hostile political organizations inside companies, and once you understand that everything else makes sense. If unions attracted top talent than companies who wanted top talent would enact them; and if they improved wages then the best wages would be union jobs. In private industry, this is essentially never the case.