Fortunately for the 'I ♥ EU' crowd, Britain is not a democracy, so the opinions of the people can be dismissed with a limp-wristed wave of the hand. But the politicos know that if they ever allow that particular Pandora's box to open, the 'grand project' is doomed to destruction.
The essential one-ness of the centrist leviathan that poses as Labour/Tory/LibDem can clearly be seen in this encounter between Charles Clarke and Daniel Hannan. Clarke, predictably, doesn't give a flying fuck what the people think, but at least he's coherent in his multiple stinking lies.
(N.B. Video posted by UKIP with some commentary)