that unions outlive their usefulness is apparently made an axiom by this story.
I think there might be more to that than you know. I seem to recall reading that Mr. Walesa has been dissatisfied with both Solidarnosc and the government for some time but I can't remember where I read that (sorry - fighting the flu and writing a thesis at the same time is the best way to turn the brain into silly putty).
If I'm not mistaken, "The Economist" has had some recent (within the past year) atuff on this.