PiS are ready to give up Polish membership in the EU solely to keep power,
Where do you hear that? It's utterly stupid. It is a moronic chant which Shetyna and his band criminals keep moronically chanting. Only idiots believe him. Even the President of the European Commission has said Poland is unlikely to leave the EU.
reuters.com/article/us-eu-poland/eus-juncker-says-poland-unlikely-to-leave-the-european-union-idUSKCN1S50BU
So, Juncker says there will be no Polexit, Kaczynski says there will be no Polexit. Only the idiots in PO and there followers say there will be.
Besides, unlike in the UK where there was a groundswell of opinion for leaving the EU, the vast majority of Poles want to remain in the EU.
Does anyone seriously think Poland would try to leave the EU without a referendum?