Merkel expresses something that is very real, in my opinion. When nations become so indebted to other nations, and their inability to repay in common currency becomes apparent and irreversible, the creditor nation's only two options are to forgive the debt, or to extract assets through coercion or force.
I've had that thought in regards to the relationship between the US and China. Their militarization and our rapidly worsening financial situation makes the likelihood of default more certain with each day. We have an awful lot of assets long after we run out of cash.