WW2 - fought to contain Germany and prevent them from conquering Europe. . .
2014 - Germany has conquered Europe. Germany they get 100% access to all the 'colonies' (EU) and also get the best and talented of the Eastern Bloc and Iberia. Germany gets all the Arbeiters (Slave workers) they want from Europe and Generalplan Ost also happens too (Germany assimilating Slavic and other European migrants) Like in Lebensraum plans, Germany products face no competition in Eastern Europe and German firms get 100% access to natural resources and agricultural lands in the east.
They get those workers because they pay more for their skills that the only reasons. Because they offer the money , the living and the working conditions people want. Else they would stay in their countries.
And that totally contradicts your second argument about slavery.
Why aren't they facing competition? Why aren't the products from your country doing the same?
Because half of Europe is made out of lazy people who want money from the goverment just because they were born there.