I gave direct sources from the OFFICAL Stats Agencies of Poland, Romania, Bulgaria, and Estonia in 2022-2023. You just gave Wikipedia.
The numbers which are on Wikipedia are AVERAGE. I'm using MEDIAN
The fact that the AVERAGE income skews significantly higher than MEDIAN income is proof that you have a subset earning much much more than the majority.
I have to question your reading comprehension. You're talking about median DISPOSABLE INCOME per capita (so it would include, disabled, retired, unemployed, part-time etc. workers). The Wikipedia link showing the average WAGE/SALARY. These are not the same thing.
You don't just seem to know that disposable income and average wage/salary is not the same thing..