It's sad to see this kind of stuff. Korea has risen as a global powerhouse so fast, it is hard for a lot of people to keep up and especially those who relied on traditional agriculture to make a living. Gangnam is a perfect example of this divide, it used to be a regular neighborhood with middle class but has become a super rich affluent area with the high class showing no regard for people below them.
I live in Haeundae Busan, and it is very similar. There are new Skyscrapers being built that sell for millions of dollars each and just a block or two away the remnants of an older traditional community. sad to see.
Where about in Seoul do you live