Movie about a dystopian future city versus country society

I think either German or French movie (subtitled) from the 90s. Colour.
A family living in a city with fake trees and birds, working in a factory. Boy escapes over a fence into the countryside where he is found and falls in love with a girl living expensive country life.
At the end he finds out that the women have lobotomies performed on the men to keep peace and he escapes back to the city.

Got something to say?