They are looking into it.
Often those words ring hollow, but it's happening: The U.S. Department of Labor has funded studies on paid family leave in six regions across the country, to determine the fiscal impact of a federal paid leave act. The studies are economic, rather than qualitative, which might sway legislators who aren't swayed so much by social factors as economic results. This could be a good thing. There is very little evidence, arguably none, that argues against the benefits of family leave on individuals, but these studies have done little to pass a national paid FMLA. If these studies alleviate the fears that the public and private sector cannot afford to fund any family leave, some common sense will prevail.