Hi Helga,
The idea "doing a great favor" to bring a Slavic girl to the West lies in the mistaken impressions that many (most?) westerners have regarding life and culture in FSU countries. Movies have not helped this false impression and so I believe that some men really do think they are able to choose a woman as they choose a loaf of bread or a carton of eggs at the grocery store because the women "will be so grateful just to get out of Russia". What a shock it must be when the men go to see Russia, Ukraine, Belarus, etc. The women are intelligent, educated, classy, feminine, cultured, etc. My ex-wife was from a higher social class than I was.
It is important to learn as much as possible, I think, to be successful in the search for a special woman and whether that is language, culture, history, geography, anything, each part brings you into her world. Slavic girls do not need to be rescued from Russia or Ukraine, they need only to be "rescued" from loneliness and lack of a man and a family. The woman is not a prize, she is a partner, lover, wife. That needs to be the approach taken to be successful.