It is the Pilots responsibility to ensure he is well rested for the flight. Same as it's his responsibility to be free from Alcohol and drugs. Maybe with the Colgan flight it may have helped to pay their pilots more than what they require to qualify from food stamps and basing them in one of the most expensive cities in the US.
I guess you would also agree to the company mandating the last 12 hours of rest must be spent in the layover Hotel?!