The problem is, if at all, in the different view of the economy, of economic growth. Growth is too low, even for us. That needs to change: More investments, a stronger role by the European Central Bank. Otherwise, there are no tensions between Italy and Germany. But on this point, compromises must be reached and we will reach them.

And a united Europe will also manage to send hundreds of thousands of migrants, who don't have the right to asylum, back to their homelands. Though that, given the number of flights necessary, would be of a scale reminiscent of the Berlin Airlift.

But it could be that we, as early as spring, will need to embark on a new policy in order to save one of the cornerstones of European politics: personal freedom of movement.

The route for the refugees currently goes through Greece and the Balkans or through Italy; if there were a crisis in north-eastern Europe, Poland might just as well be affected. In this case we are dealing with mechanisms that we do not control. We need to change that.

We [European countries] probably need to move forward together, each at their own speed. The faster ones, that could be the countries in the euro zone. The others would be those who are interested in the continued development of the common market, but reject the idea of an ever stronger political integration.

The problem is, if at all, in the different view of the economy, of economic growth. Growth is too low, even for us. That needs to change: More investments, a stronger role by the European Central Bank. Otherwise, there are no tensions between Italy and Germany. But on this point, compromises must be reached and we will reach them.

But joint pressure from states like Germany, Italy and France could mean a move in this direction. Because something very fundamental is on the line: freedom of movement. I can't think of any common market that could function without it.