http://in.reuters.com/article/2012/06/27/eurozone-merkel-idINL6E8HR9MW20120627
"Euro bonds, euro bills, debt redemption funds are not only unconstitutional in Germany but also economically wrong and counterproductive."
(And)
"Joint liability can only happen when sufficient controls are in place. I would point out that neither the federal government and states in Germany nor countries like the United States or Canada have total joint debt liability for the bonds they issue."