I think it can almost be safe to say that you live in a modern, industrialized economy when consumers become conspicuous.
Yes, there is a thin grey line there and I believe the definitive measurement is chrome hub cabs: aka rims.
I just saw three different cars driving around outside with some flashy rims (no spinners though). It could be that the drivers are all in college (I live near Kyung Hee University), as it is still impossible to guess how old azn people are. Ageless between 20 and 40.
Other things the local men typically blow their cash on: “massage” parlors, horse gambling, liters of soju.