Thierry Baudet, who leads the Forum For Democracy party, confronted European Central Bank (ECB) president Mario Draghi in the Dutch parliament last Friday.
During the debate, the insurgent politician forced a concession from the central banker that a political union was indeed the final step of the European project.
Mr Draghi said: “Last week or ten days ago, I was invited to do a speech at the Jean Monnet Foundation.
“On that occasion, I had the opportunity to read some of his writings. In his view, there was no doubt, that the sequence is single market, single currency, political union, and that is still the case.”
Mr Baudet told the Express.co.uk: “It was very instructive. Not just for me but for the rest of the audience, my fellow MPs, who continue to say: ‘ we are not on the path to federal union, nobody is talking about federal union, it is just sovereign states.’
“He basically confirmed that monetary union cannot continue to exist in the long run without a political union, following up on it.
“He admitted [that] what Guy Verhofstadt is always saying and is always ridiculed for, is actually the policy of the EU.
“All that c**p they are always saying about the EU is not true, they are on the path to federal union, they are outspoken about it and you can be for or against it, but you can’t deny it.”
Mr Baudet’s party started as a political think tank and campaigns to extract the Netherlands from the European Union. It gained two seats in March’s general election and is on course to form part of the opposition in the House of Representatives.
He said the comments from Mr Draghi should be heard loud and clear amongst his political peers. “All those who are saying the Brits are over responding to it and the eurosceptics are making a caricature of the EU. They are wrong: we are right.”
Mr Draghi went on to add during the debate that he didn’t believe the time was right at present for a full political union.
“When is it? We don’t know. Why? because you need the conditions, namely trust. Trust in the compliance of the rules, compliance in the governance of the eurozone and convergence. We can’t have union with divergent countries,” he said.
Later during the testy exchange between Mr Baudet and the European Central Bank boss they turned to the Netherlands’ future in the bloc’s single currency.
Mr Baudet raised a document which referred to comments made by Mr Draghi, claiming that if Italy were to leave the eurozone they would have to pay back the difference in what they owe.
He said: “As we, the Netherlands, now have a surplus of about €100bn, does this by your own words mean that if the Netherlands decides to leave the eurozone, which is one of the key points of my party’s programme, we would get back €100m from the southern countries in the eurozone according to your views?”
The ECB president insisted that countries would not be able to get the money they have put into the bank back if they withdrew.
He replied: “Let me…