Yes, Jean Monnet, pretty much the founding father of the EU, said this in 1943
“There will be no peace in Europe if the States are reconstituted on the basis of national sovereignty, with all that that entails in terms of prestige politics and economic protectionism. The countries of Europe are too small to guarantee their peoples the prosperity that modern conditions make possible and consequently necessary. Prosperity for the States of Europe and the social developments that must go with it will only be possible if they form a federation or a "European entity" that makes them into a common economic unit.”
Federation was always the goal and it was in direct response to WWII.
“There will be no peace in Europe if the States are reconstituted on the basis of national sovereignty, with all that that entails in terms of prestige politics and economic protectionism. The countries of Europe are too small to guarantee their peoples the prosperity that modern conditions make possible and consequently necessary. Prosperity for the States of Europe and the social developments that must go with it will only be possible if they form a federation or a "European entity" that makes them into a common economic unit.”
Federation was always the goal and it was in direct response to WWII.