In Poland, you can have a decent life with around 4000PLN, net (around 1000 euros). Maybe a bit more in big cities.
So average salary:
Central Statistical Office of Poland (GUS) provided in 2009 that 65,35% of Polish wages are below Polish avarage wage and this is a fact.
The most common wage was 2.091,35 (about 700USD)
Only 10% earned more than 5.376,34 PLN (1792 USD)
only 34,65% employees had avarage wages (3.232,07)(1077USD)
All data quoted are gross monthly wages.
In relation to wage and context it is much cheaper to live in Germany ; otherwise Poland would be flooded with Germans rather than the other way round