1) It isn't a truly unique ability(It's entirely copied from the India's UA with the removing of the double unhapiness per city);
2)It doesn't have any kind of connection with the "Szlachta" system;
3) It is deeply broken and horribly OVEROVEROVERpowered;
With suggestions like this,I'd rather prefer not to see Poland in Civ5 . If you want some kind of happiness system,take India and forget Poland .