The fundamental mistake of the referendum campaign was allowing the Leave side to paint the EU as an unchangeable organisation, a regulator rather than a democratic supranational body which can be right-wing or left-wing
“the EU is an economic and political disaster zone: it is a machine for imposing austerity and…
Jonny Roberts
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But is that really true?

The Lisbon Treaty would indicate otherwise…unless the conception of left-wing here encompasses only non-economic policies.

“But above all, people understood often for the first time that the entire economic programme of the EU was, and always had been, completely neo-liberal and put “free and undistorted competition” and the free market way above social protection.”

https://www.tni.org/en/article/rise-of-neoliberal-and-undemocratic-europe

How many (on the left or otherwise) in the EU have treaty change as a declared goal?

That’s some tanker to turn around…