Slums in Buenos Aires?

I saw a show about the Tango in Buenos Aires recently . . and what I loved was what a jewel of a city it appeared to be, what with some beautiful neighborhoods that remind one of Parisian charm and all. Upon reading a little more about the city there are 9 slum neighborhoods in the surrounding suburbs. Pictures of them look like most S.American slums where the impoverished live without amenities. Can anyone here speak about this and enlighten me as to the conditions in and around the city. . . is there a culture of the impoverished walking around the streets like you see in some S.American cities? Or has the government made any real strides in cleaning up this problem and providing better housing? Any information about the overall culture of the people?