Okay first the EU econonmy (of which a large percentage is spent on farming) is smaller than 1/10 th of the US federal economy. While yours is about 10 trillion and all of the EU members (15) added up is about 9 trillion, the EU (quasi-federal or confederacy) has a budget of less than a trillion.
Farm subsidees are gonna get re-vamped in 2007 and possibly eliminated entirely by 2013.
And yes while Germany is on the brink of recession (it is probably there, but it did have it's first positive growth last quater after 3 or 4 consecutive retractions), other economy's are growing. The expansion is both a blessing and a curse, it's a curse for the fact that when the new members adopt the Euro their potential for growth will be stunted (because of the Euro's extraordinary strenght at the moment), but a blessing because either way investment will move in there.
By 2007 Greece, Portugal and possibly Ireland and Spain will also be net-contributors to the EU budget (all small fry except for Spain I grant). So the EU or more specifically the 'Euro' economies will converge.
Having said that, you will not now or ever be a third world country if your economy melts down. Everyone else has listed the appropriate responces (your strong infrastructure and know-how) but here's another insight.... Simply because the rest of the world is tied into your economy. If the US goes bust, it drags a lot of people with it. So while it certainly won't be a good thing, you still will be better off than those that are in third world countries now or in the future
