Last week, 203 business-school faculty members from 88 institutions across the US wrote an open letter to members of Congress stating, "It is time to ensure that the entire United States workforce has access to paid family and medical leave." The signatories urge our legislators to consider the Family and Medical Leave Insurance Act (FAMILY Act) as one solution. This bill, which I wrote about here when it was first introduced, would use a payroll tax of two-tenths of one percent to fund a "social insurance" system that would allow all workers to take up to 12 partially paid weeks off work to…