How about revising that?  Yes, keep the ban on fund raising during a session.  In addition, penalize incumbents 2 for 1.  Meaning each day of overtime is a day in which they can't scrounge for bucks but, in addition, for each day of overtime they must also be restricted from fund raising for another day AFTER the session ends.  Go overtime by 10 days and lose a total of 20 days of............