Jesters in the court

Their ancestors fought for 800 years to kick out the muzzies. Today, Spain is bending backwards to accommodate the old enemy:

The Spanish supreme court has granted two women, the widows of a Moroccan polygamist, the rights to widows’ pensions in a landmark ruling, claiming that polygamy does not prevent pension allocation despite it being illegal.

The "punishment" for the wives is that they'll have to share the pension. What exactly is the point of a law which declares an action illegal while having zero consequences for the guilty criminals?