If anyone is interested in learning more about why no one goes to jail, and banks dont even have to admit they did anything wrong, etc., I recommend you go pick up a copy of Matt Taibbi's new book "The Divide"
He goes into great deal regarding why the most egregious white collar crimes such as HSBC laundering money for the Mexican cartels / terrorist organizations ended with a simple 1.9 billion dollar fine (http://www.reuters.com/article/2012/12/11/us-hsbc-probe-idUS...), no one going to jail, and the bank not even having to admit they did anything wrong.
There are many reasons why (after all, he wrote a whole book about it) but to list a few
1. The Justice Department does not want to risk losing a case (for political reasons)
2.The unit in charge of investigating this type of crime within the justice department is staffed with defense lawyers who dont think out of the box (thanks to obama)
3.the banks committing these crimes are large, multinational institutions so there are complexities around the fact of who committed the crimes, what jurisdiction they were committed in, etc. the most disturbing chapter in the book was a about a hedge funds harassing (literally harassing) a Canadian insurance firm Fairfax financial. The judge ended up throwing out that case because it took place in NJ but the crimes took place in NYC: http://www.swtriallaw.com/press-releases/new-jersey-court-cl...
4.the banks have a lot of money to spend on lawyers
5.the same lawyers that are defending the banks create the laws and regulations they live by (Eric Holder and a few others)
6.this memo: http://www.huffingtonpost.com/2013/06/04/eric-holder-1999-me... - that is, anything that might hurt innocent bystanders—when deciding whether to bring a case against a corporation. "Prosecutors may take into account the possibly substantial consequences to a corporation's officers, directors, employees, and shareholders,"
7. That banks argue that a prosecution could be economically disruptive because they are "too big to fail" so basically if you hurt them, you are hurting everyone else also.
It is really a fascinating, and in some ways depressing, read.
Honestly, this is nothing compared to the banks getting caught fixing the LIBOR rate a few years back, and no one went to jail for that anyways.