The change in nations Core populations (25-54yr/olds) have driven economic activity for the later half of the 20th century, first upward and now downward. The Core is the working population, the family forming population, the child bearing population, the first home buying, and the credit happy primary consumer. Even a small increase (or contraction) in their quantity drives economic activity magnitudes beyond what the numbers would indicate.
To highlight the linkage of Core populations to economic activity, the chart below shows the European 25-54yr/old population vs. the best indicator of economic activity, total energy consumption (data available starting from 1980). The implications are pretty straightforward. European economic activity (& resultant energy consumption) will contract for decades, at a minimum, with the declining Core population. The pie is shrinking and now it's simply a fight for who gets bigger slices.
Given this, consider Germany was well aware of it's post WWII collapsing birth rate and the impact of this on economic growth as this shrinking population of young made it's way into the Core. Consider Germany's Core population peaked in 1995 and it's domestic consumer base has been shrinking since, now down over 3.3 million potential consumers (about a 9% Core decline...remember a depression is a 10% decline in economic activity, which a 9% and growing decline in German consumers would have almost surely induced).
The chart below shows Germany's Core population from 1950-->2040...but understand this is no guestimate through 2040. This is simply taking the existing 0-24yr/old population (plus anticipated immigration) and sliding them into the Core through 2040. Germany's Core population is set to fall by over 30% or 10+ million by 2040 (far more than the 7 million Germans of all ages who died in WWII).
And this had the desired effect of turning what was a rising German debt to GDP ratio during re-integration of E. Germany into a falling ratio (chart below).
So the German motivation for the EU and Euro are fairly plain as are the resultant economic transfusion from South to North. But for Germany to be a winner, there had to be a loser in this shrinking pie game. Hello PIGS (Portugal, Italy, Greece, Spain), you lost. As the old poker adage goes, when you don't know who the sucker at the table is...it's you. Particularly when you "win big" at first and it all seems so easy...but then it all turns.
To extend the game a bit longer (and multiply the harm), un-repayable government debt has been substituted to keep the PIGS consuming since 2007 (chart below).
How it played out...
The chart below shows the impact of the implementation of the EU and Euro on the different parties. Clearly the PIGS were fattened up on cheap credit. These nations became used to unsustainably fast growth and the good life, buying really nice German exports and undermining their own national brands.
But then the phony PIGS growth turned to real and deep contraction (chart below). However, the slowdown was quick and shallow for Germany and the BLICS. French GDP likewise turned upward after a shallow contraction but did so on a large increase in debt and continuing high levels of unemployment. Quite the opposite of the trends in Germany.
But why would small to tiny financier nations be the greatest beneficiary of the new EU? Untold quantities of nearly free ECB money & distortions does wonders for those who can get their hands on it. In this respect, a peek at these nations US Treasury holdings is quite telling. These tiny nations are now five of the top 13 foreign holders of US Treasury's (Ireland is #3, and Cayman Island #5, Switzerland #6, Luxembourg #7, and Belgium has slipped to #13). That these are America's creditors is laughable really!
I'm just guessing but the timing and size of BLICS Treasury purchases sure looks like it was front running in conjunction with the ECB's 2011 LTRO and subsequent 2014 TLTRO?!? The chart below shows the BLICS Treasury holdings back to 2001. "Financialization" writ large for nations that don't produce much of anything.
As Europe's Core population collapses (and economic activity with it), the Euro and ECB seem to be serving a select few at the expense of the majority. The imbalances and distortions will only grow as the attempts to mask who the Euro and ECB truly serve continue. What little vitality exists is being transfused to prop up the few. Hope this has been thought provoking and make of this what you will.