In the United States, presidential candidate Pat Buchanan is against an open society. In France, Jean Marie Le Pen is against an open society. So while, of course, this is a schema which may consequently be muddled, it is nonetheless also rather correct. Strikes are experienced in every democratic country, including Poland. So long as there is democracy in Poland, there will be strikes.
Poles are a rebellious nation, regardless of who is governing.
There is nothing to prevent this. As to concrete causes - it is a bit of this government's policies and a bit of the last government's policies. No, this is a waste of time. There occurred a normal separation of interests. This was inevitable.