Among the affluent, they'll go for instance to Sopot and area for a few days but will spend their MAIN vacations abroad.
That is true for the upper-middle class pole. But definitely not for the middle-middle pole. People that have a 2000 zloty salary netto will not go abroad 1 time per year, unless they are youngsters living with parents or unless we are talking about neighbouring countries.
For Poles who don't have great financial means (most of them), a last minute deal to Southern Europe and to Turkey/Tunisia will always be better than staying in Poland.
Sometimes i doubt that you had ever lived in Poland or have any contact with the general pole except those that frequent the same boutiques as you.
The absolute majority of the Poles doesnt have 2000 zloty to spend on holidays in Tunisia, specially having in mind that a family with a kid would spend... 6000 zloty, or more than 2 months of salary (and i am talking about the normal pole, not the lefties bon vivant that you probably know).
All the Poles I know (middle-middle and upper-middle class)
you don't know middle-middle poles or otherwise you would not say that it is easy to them to spend 6000 zlotys on holidays.