Poland has long had the highest public approval for the EU out of all member states, precisely because EU investment is very visible and widely acknowledged and enjoyed - and at least in part because Poles have really taken to the opportunities of moving to other countries, right across the EU.
One aspect of the EU that barely gets mentioned here is that there is a degree of welfare state about it, redistributing to the poorest corners of the EU - this is undeniable in Poland - the difference between what its like now and post-1989 is staggering, but even so I am amazed to think it could overtake British average wages.
Of course this EU spending needs to be countered by the experience of the likes of Greece when being dealt with by the Troika of European Commission, European Central Bank and the IMF, but it doesnt stop the redistribution aspect from being true.