The problem with this approach is that you're talking about the past. Yes, Poland and others did profit from joining the EU, initially, but once EU realized that they changed the rules of the game. EU is not about economic prosperity anymore, it is all about "climate change", immigration and similar bullshit. Lisbon Treaty in particular redefined how EU works. The best thing to do right now is to leave the EU before it collapses.
Somebody has to pay for the subsidies. If poorer countries get them, richer mebmer countries will have to pay for them. Richer countries, like Iceland, will never get subsidies.
