The Sunday Times has reported that:

A partner at one the world's biggest accountancy firms said: "By buying stolen data, tax authorities have encouraged anyone in a bank in Liechtenstein, Monaco or any other tax haven to sell private banking records for cash.

"Ethically and legally that is surely a highly questionable way to proceed."

Not half as questionably as selling the corruption services in the first place, I say.

And let's remember, all the Big 4 are in Liechtenstein, and there's not a single ethical reason I can think of for them to be there.