Just to show what is actually happening in real terms in Poland, here's a graph of the motorways and express roads over the past 11 years:
And if that is not enough, Click Here for an excellent view of Polish roads, you can choose your year from 1936 - 2015
I understand that Milky claims he lives in Ireland, so the only thing he really sees is Polish people working there and he claims that this was the only
driving force behind the increase in property prices, which is only a part of the big picture (approx 2 million emigrated vs the 38 million here).
It would be too simplistic to say that there is only one cause for Poland's relative success thus far, Balcerowicz Plan, Devaluation of the Zloty (perfect timing), E.U. funds and emigration are what I would consider the most important issues, maybe others could add to it?
The whole idea of the E.U. is to get all countries on a level playing field, it will take time but we are well on our way.