Actually, large disparities in interest rates between trading partners is very much a disadvantage. Again - Draghi started this war by going really negative in order severely lower the Euro versus the Dollar; and it's worked. So yeah, Draghi started a currency war by radically lowering rates. By design. And he told all the ECB banks as much.
I can't go here right now. Opened up a can of worms for myself when I knew better. I'll send you the book when I finish writing it. Nonetheless, I hold firmly to my statement.
