That was the excuse they sold to the public.
But you know the inside story of what really happened, which I'm sure you'll share with the rest of us.
Over the last two years I've spent a lot, and I do mean a hell of a lot of my time, talking to anti-EU types. One remarkable thing I have noted is that their many reasons for hating the EU pretty much all boil down to conspiracy theories and fantasies. The EU is a puppet of our corporate overlords is a fairly common one.
It's a common simplification to believe that, just because something seems designed to favor big companies and their economic interests, it would have to be the result of a conspiracy.
That is not how capitalism works. You don't need sinister overlords weaving their webs. The founding states of the European community were capitalist states. The concept of a United Europe is based on the concept of capitalist growth in a free market. So, yes, the EU is designed to stabilize the capitalist system and not to put the big players of the European or global industries at a disadvantage. They didn't have to conspire. The EU simply was not the attempt to revolutionize the economic system or to redistribute wealth or the means of production.
One of the main motivation in the aftermath of WWII WAS to prevent wars between the member states. I have a lot of critique regarding the EU, it's democratic legitimization processes, it's migration policies, it's bureaucracies etc. But the EU was pretty successful with keeping the internal peace, and that is one hell of an historical achievement we shouldn't just throw away.
There are valid concerns regarding the democratic deficits of the EU institutions (and there are also valid attempts to work on these issues). Two decades back or so, I might have entertained ideas to disband and reorganize the EU, too. Nowadays - we don't have time for that. We are facing global crises of unknown dimensions. We desperately need international cooperation to fight climate change and to prepare for it's consequences. We need cooperation to fight the rise of populism and fascist movements. We need international cooperation to deal with the inevitable mass migration to come. We need European cooperation to counter the shift in the global power balance. All these things can not be answered on a national level (and btw, the majority of nation states weren't founded by basis-democratic people's votes, either). Calling for disintegration and re-nationalization -now- is terribly short-sighted and dangerous. We need to work with what we have, even though it's anything but perfect. Just like with the UN, there is no practicable alternative right now. And we don't have the time to build one.