Here is a recent table of average earnings of Poles in the different regions of Poland - in Warsaw an average salary is 3,450 Zlotych (I believe it's before taxes; after taxes it should be about 3,000).
Don't think so, can i suggest approx 2800zl.... interesting stats, don't forget you have a huge bucket of people like politicians and business people etc that bring up the average, I'm sure the average bus driver, cleaner, clerk, office worker don't see that sort of money....very misleading figures.