AIGFP only had 377 employees. Those 400-odd folks received almost $3.5 billion in compensation in the last seven years, a very large part of that money coming from the sale of credit default protection. Doing the math, that averages out to over $9 million of compensation per person.
Ask yourself this question: If your company made that much money, and the boss of the unit made almost $280 million in just a few years, exactly how likely is it that you wouldn't know where that money was coming from?