Bullshit! If Poland left the EU, she wouldn't be bound by lots of the EU limitations that only The Monty Python Flying Circus would have been proud of, the limitations that stifle or actually murder the Polish economy, eg. the coal industry. It's also about the absurd regulations that allow huge financial drainage from the Polish banks. Oh it would be a lot to say.
Briefly, the very leaving the EU would give much more profits than all the rest put together.
I could never understand why Poland wanted to be dictated to by Germany who controls the EU.
Germany and Poland have never had good relations even in the best of times.
You’re right. Outside of the EU, Poland would be able to mine all the coal it wants... and sell nothing to anybody. Access to trade, capital and labor markets is kind of a big deal. Particularly for Poland.