Why is healthcare so cheap in Korea?

I'm really intrigued by the fact that healthcare in Korea seems to be so affordable compared to other developed countries. Could you explain what factors have contributed to this? I've heard about the country's universal healthcare system, but I'm curious to know if there are other reasons why healthcare costs are so low in Korea. Also, I'm interested in knowing if the quality of healthcare services in Korea is comparable to other countries with higher healthcare costs. Could you provide some insights into this?