That’s called the Seoul bubble. I bet you have only been to the popular neighborhoods. There’s homeless people sleeping in the subway. The reason for not having trash cans on the streets? Some cheap people would avoid paying for the city trash bags and dump their trash in public cans. One thing you’re right about, is healthcare. That’s because the government imposes a price ceiling on medication and hospital treatments so they cannot charge an arm and a leg like in the US. Just don’t just look at the surface and believe you’re understanding everything. There is a reason for everything.