Lisbon Treaty was a democratic exercise
EU membership is a voluntary decision by 27 independent, free and democratic countries in which people elect those who govern them. It is the essence of democracy that the elected governments of the 27 EU countries spent many years negotiating a treaty on behalf of all of us.
Throughout the EU, therefore, we are all accountable and responsible for the Lisbon Treaty since the people we elected to act on our behalf negotiated it.