Is there already an established class in Poland trying to protect its interests?
hahaha, there was before 1989, hence Solidarność.
Communism, capitalism, whatever, there is always a pecking order, always some group maintaining the established order over everybody else. It is what happens when you add people to noble concepts and ideas.
[an edit] I would like to add that capitalism is probably a bit more honest about the way things go down. Under that system, you basically have a bunch of rich dudes scheming about how to better their own position motivated by pursuing self-interest. Keeping others down is just a largely unintended bi-product of that pursuit of self-interst. With communism you actually had the established order sitting about plotting to keep the masses down, it was one of their primary aims. :)