I was unaware of this, but apparently the current international investigation into the Liechtenstein tax haven fiasco was initiated by a mole that used to work at the LGT Bank:
Authorities in Liechtenstein have condemned the purchase of what it says is confidential bank data.
LGT Treuhand, part controlled by the principality's royal family, claims the list of 1,400 customer names are contained on DVDs that were copied by Mr Kieber in 2002.
So, it seems that countries such as Germany and the UK paid upwards of $7.7M to the mole for confidential bank data that he had copied onto DVD's while he was an employee at the Liechtenstein bank. I am sure this has sent a shudder up and down the spines of not only many wealthy folks that use international banks, but also entire countries that market these banks as the utmost in financial privacy.
Finally, the interesting and downright scary part about paying a mole that illegally (or at least unethically) copied client data onto a disk is that these countries are (un)intentionally creating a market for similar transgressions. That is, any bank employee that wants to make a quick million (or five) can just copy data, offer it to countries, and get a new identity. It's a nice gig with limited downside.