EU wants automatic exchange of Tax information

The EU develops more and more into a bureaucratic and undemocratic monster. The latest news is the 'demand' for an automatic exchange of tax information about foreign bank customers between member states. The EU was originally declared to be an economic union but the main instigators behind the 'project' always intended this stated purpose to be the Trojan horse that would allow their statist fantasies to be imposed piecemeal on an unsuspecting population. Napoleon and Hitler certainly would have been well-advised to try this approach rather than go the route of military conquest.
The raison d'etre of a state is that the citizens of that state enjoy full sovereignty over their affairs. Delegating powers to a foreign authority - especially one that they have no control over - is a grave violation of that principle. In the case of taxes there is no reason to inform any foreign government in any way. The whole purpose of putting money into another country is to remove it from the sticky fingers of the home government. The host country than in turn can tax the affected funds in any way it wishes. In the interest of tax harmony it should not favor foreign investors in any way and give them different terms than those offered to home country investors.
The home country of the funds concerned has in turn full authority to tax the money as long as it is in the country. If it so wishes it can create an 'Iron Curtain' and prevent money from leaving the country.
Just imagine what 'full information' would have meant in past periods: would the Dutch have 'informed' the corrupt French regime of Louis XIV about the investments that prudent French citizens had made in Amsterdam, or should the French government of the 1920s have informed the thuggish Communist government of the USSR?
Europe prospered BECAUSE there was no uniformity of government and religion had finally given way to a civil regime after centuries of struggle. How much longer can the control freaks in Brussels be allowed to destroy the fruits of these battles?