The British contingency planning is that collapse is just a matter of time. They're preparing for riots and social breakdown, and what do with Brit citizens inside the EUzone unable to access cash or the bank accounts....
http://www.telegraph.co.uk/news/poli...ice-warns.html
And also note the final "worst case" part about a 50% drop in GDP for euro member states. Economic output drops in half. That is collapse territory, not mere depression.
And if(when) that happens, that will sweep over here to the US and consume our own idiot banks like wildfire.