Try passing these paternity leave policies as a law and see which side those companies are on then. You will quickly get a taste of reality. Capital loves to perform generosity when they retain the power to stop at a moment's notice and lay everybody off with no cause.
The 40 hour work week was won with nothing less than years of backbreaking struggle and 4 innocent lives lost at the hands of the mitary assigned to break the strike.
US workers have not won any universal workers rights in living memory. The decimation of labor unions and the CIO in the McCarthy era put an abrupt end to that.