Last week, European Union leaders agreed to tackle tax avoidance through an "automatic information exchange between tax authorities" to monitor the situation.
The fact they will have automatic information exchange with the UK and USA does not change the position that Germany, Italy, Russia and more can't get this information.
U. citizen put their earnings in a trust or company in Luxembourg, that trust or company would be subject to an automatic information exchange that would identify individuals behind them.
At the event, Iwata showed off how 3DS consoles can passively exchange data between each other in an automatic Tag Mode and how Mii customizable avatars will make their way onto the system.