EDIT: x-post. This is for Winner as well. When you read this, please bear in mind that I'm NOT talking about historic Cold War terms - and not even the 1990s. I'm talking about Europe since 2004.
Funny, This isn't about the EU, or economy, this is about Culture.
It's not about any of those things, it's about
values - liberal, democratic values.
I agree with you, Poland is in the Eastern Half of the EU (maybe not for much longer if Ukraine joins, which i think they will).
Perhaps if/when Ukraine and/or Turkey join, "Eastern" will be redefined again.
So... Switzerland, Norway, Iceland, the Balkans, are all not in Europe? Who knew!
Switzerland, Norway and Iceland share European values. If their population clicked their fingers and suddenly wanted to join the EU, they would of course be welcome (Norway was accepted 35 years ago!). The Balkans are slightly different. If they were to click their fingers and want to join
as is, I doubt they would be accepted. But in reality,
wanting to join goes hand in hand with
wanting to modernise their social, democratic, and economic institutions. So if they - as I expect they will - modernise their institutions, they will
want to join, and then be accepted, in the same way that PL and CZ did.
Of course, you are correct, though. They are part of Europe. But they are neither "Eastern Europe", nor "Western Europe". When we talk about Eastern and Western Europe, we are talking about only those countries that share values of other Eastern and Western European nations. So while we
can talk of them as being European, we
wouldn't talk about them being Eastern European or Western European.
I hope that makes sense to you. It's hard to put this into words.