I am happy to report that Transparency International is making a big new push against health care corruption. Therefore, many Koreans also join a private health insurance that covers what the national health insurance does not cover, such as deductibles (which can get high, since it's a percentage of the NHIC-set cost rather than an absolute amount,) lost wages, etc.
The government bought the idea lock, stock and barrel because governments love surveillance of citizens and because our government is in bed with, or in the pocket of, giant technology companies aspiring to liberate a piece of the $3 Trillion health care market.
I listened endlessly to complaints, some subtle and some resentful, about the vast amount of money doctors made, from folks with a thirty-five hour work week, benefits and fat pension, when I was working twice as many hours with no benefits and no pension (until I was smart enough to become an academic and working for he University, which is, of course a civil service job).
In case of joint ventures there has been a long-standing concern about arrangements between those in a position to refer or generate Federal health care program business and those providing items or services reimbursable by Federal health care programs.
After 45 years of tinkering with Medicare and Medicaid, Obamacare in a bold stroke expanded the welfare model of medical care upwards into the heart of what used to be known as the American middle class, the former engine of progress and prosperity.