I am not familiar with this case. But I like your point that white-collar criminals create much more damage that the average burglar. I would even say more damage than the average murderer, when we consider the ripple effects of large white collar crimes. They really do need to be punished.
I went to a talk by a Canadian police officer. He said that it takes the state about $30,000 to investigate, arrest, and prosecute a holdup at a convenience store. And then there is the expense of putting that criminal in jail. The expense for white collar criminals must be much higher, hence the reluctance for the state not to prosecute. So white collar criminals can play the odds that even if they do get caught, they won't face punishment.