I can tell you from personal experience that pretty much every Kdrama show I can think of, has the same narrative of the "Elite" being corrupt and abusing it's power and influence to do what they want vs the middle and poorer classes. Maybe not always as the focus of the story, but it's a common element. And it's not just the popular shows that make it big internationally. I guess it's ingrained into their culture.

I'll name a few shows that come to mind (also recommend them):

Itaewon Class: About a young man fighting the CEO of a mega company after he ruined his life.

Vincenzo: An Italian mafia consigliere/lawyer finds himself fighting against a mega corporation who uses mafia like tactics.

Save Me: A girl who is trapped in a cult is saved by her former classmates. The cult is heavily involved with politicians and other powerful figures (including the police) who keep people who try to go against the cult in check.

The Uncanny Counter: A supernatural show with the main plot involving political corruption that spreads as far as the police, media...

The themes are always very similar, political corruption, corrupted law enforcement and judicial bodies, mega corps getting away with severe crimes by using money, the little people being unable to go after the rich unless they have irrefutable proof and even then... classism and economic inequality.