"Economic and monetary union...is incompatible with independent sovereign states with control over their own fiscal and monetary policies. It would be impossible...to have irrevocably fixed exchange rates while individual countries retained independent monetary policies...such a system could never have the credibility necessary to persuade the market that there was no risk of realignment. Thus EMU inevitably implies a single European currency, with monetary decisions...taken not by national Governments and/or central banks, but by a European Central Bank. Nor would individual countries be able to retain responsibility for fiscal policy. With a single European monetary policy there would need to be central control over the size of budget deficits and, particularly, over their financing. New European institutions would be required, to determine overall Community fiscal policy and agree the distribution of deficits between individual Member States... It is clear that Economic and Monetary Union implies nothing less than European Government...and political union: the United States of Europe. That is simply not on the agenda now, nor will it be for the foreseeable future."
January 1, 1970
https://en.wikiquote.org/wiki/Nigel_Lawson