Why just in the last 5 years? They got a lot of money from the EU since 2004. And that's fine, because the EU also profitted from their membership. All relative

Why just in the last 5 years? They got a lot of money from the EU since 2004. And that's fine, because the EU also profitted from their membership. All relatively poorer EU countries are net receivers, but not all of them are able to use that money effectively, at least some because of huge corruption. So good for Poland they've been able to invest that money into good causes.