Maybe it's just the pictures, but it always appears to me that Bernie has a smirk on his face like the cat that ate the canary. In his smugness I see a guy who thinks by pleading guilty to his crimes he has saved his family and friends. Maybe he thinks he has redeemed himself from the wrath of heaven by not revealing who aided him in his Ponzi scheme. Maybe he thinks this makes him a good guy in that by pleading guilty he does not have to expose himself to a public trial. And since he is actually being sentenced to death he can lie at will. The guy is 70 years old and will never be a free man again. So it will be a death sentence for sure.
But, Bernie, by not telling what you know you really are exposing everyone who ever worked for you to guilt by association, whether they were guilty of wrong doing or not. You may be protecting family and friends, but you are making life far worse for the people who worked for you, who pushed papers around in fear that if they didn't they would lose their jobs. By not exposing your accomplices you condemn everyone.
More shame Bernie.