To be precise the issue is that capitalism will always optimize for "most profit" and little else, simply due to the design of the capitalist "machine". Koreans are simply very very good at capitalism, and the result is a society where most will barely scrape by, constantly working, while those at the top reap massive profits. If you've been paying attention, you can see the same exact thing here in America, with a little more wiggle room due to the wide range of cost of living throughout the country.