Yeah, but in context, is the claim of being less corrupt being made about pan-EU institutions, or does it extend to the countries making up the union? The relevancy of individual country statistic depends of that distinction.

Yeah but the great-GP's statement is incorrect if he means the European Union as it is now, so he logically must mean something else, e.g. EU before the 2004/2007 enlargement (he might not know that it happened, the most corrupt countries joined during those and thus moved the average) etc. He also might've meant the EU as in the organization itself which is a completely different meaning with completely different results.

> the great-GP's statement is incorrect if he means the European Union as it is now, so he logically must mean something else

E.g. your assumptions being incorrect. You could have avoided a lot of downvotes with showing some humility. Assuming someone does not know about large shifts in EU membership seems like argument in bad faith.