Absolutely. I know several Poles and they feel they have to work in other countries and it’s really bad for Poland. It also makes the workers who leave greedy and think only of money, and as though the future will always be the way it is now. In fact I was discussing withe one recently and I said probably the UK will leave the EU (he spends a lot of time in Britain working) and he couldn’t believe it. He’ll be shocked...
In the short term, it gave Poles the opportunity to gain valuable experience they couldn’t get back home. But they need to come home with that knowledge and build their country, and create opportunities for other Poles so they won’t feel compelled to leave the country.