True, but a treaty means that the other nations too accepted the US laws.
Have you read about FATCA, Gabi? The choice is either disconnect yourself entirely from the banking system, or accept it. And accepting FATCA == throwing away financial privacy.
Even Switzerland and Liechtenstein have bowed. Also countries like The Bahamas - which has no personal taxes of any kind, so it doesn't have any infrastructure in place to monitor people's financial life - are adapting.
So yeah... the topic title isn't very inaccurate. US regulations to rule them all indeed.
Welcome to the New World Order, join or get crushed.
