Ignominy, impeachment, death sentences, imprisonment: What's the problem with South Korean presidents?

Earlier on Saturday, Yoon apologized for his controversial move saying on national television, "My decision to declare martial law has stemmed from desperation as a leader of this country. But I caused the people anxiety and discomfort in the process, for which I am deeply sorry. I apologize to the South Korean people."

Yoon could still face another impeachment vote for what lawmakers see as an unconstitutional power grab. But whether he survives the last two and a half years of his term or is booted from office, Yoon has already joined a list of predecessors with serious stains on their reputations.

If Yoon one day enters a prison cell, it will likely shock no one in Korea. After all, the odds are not in his favor. Not counting Yoon, four of the last six democratically elected presidents of Korea have done jail time. Expressed as a percentage, that's more than 66%.

Korean democracy looks storybook perfect, but consider this: Since World War II, the nation has had 13 heads of state. The first five were not paragons of democracy. Of those: one was forced to resign and flee the country, two were deposed in military coups, and one was assassinated by his close friend, who was also the head of South Korea's equivalent of the CIA.

Out of the eight democratically elected presidents (which includes Yoon), all have been implicated in scandals. Even Kim Dae-jung, the late dissident-turned-president who won a Nobel Peace Prize, is now viewed less favorably after it emerged that he essentially bribed North Korea into holding an unprecedented inter-Korean summit meeting.

So far, four elected Korean heads of state have served time in prison, two were impeached with one convicted and removed from office, one ex-president jumped off a 150-foot-high mountain cliff, dying by suicide in 2009 after his aides, relatives and even wife and son were investigated for bribery and other corruption charges. Since the country's founding, another two presidents have been sentenced to death but later pardoned.

One would be forgiven for assuming the above were a script for a Korean TV drama series. Korea is a democratic, highly educated, extremely technologically advanced, conservative and deeply religious society. So, why do almost none of its ex-presidents end up enjoying a happy post-presidency?

"The president of Korea has a great deal of power, too much power in my opinion," Professor Lee told Fox News Digital. "Some have called it an 'imperial presidency.' What that leads to, of course, is hubris."

In North Korea those values are expressed in slavish devotion to the absurd notion of a dynastic communist state where people explode into tears and clap feverishly at the sight of their overly well-nourished, baby-faced dictator, Kim Jong-un - or Kim the Third - as he's followed by an entourage of scribes who write down his every utterance, ensuring not a grunt of his near-divine wisdom is lost to posterity.

In South Korea, loyalty and deference to authority (alongside a host of other values, of course, such as hard work, thrift, and commitment to education) have created an economic powerhouse with electronics mega giant Samsung and rapidly growing carmaker Hyundai just two examples of globally respected Korean brands. K-pop and K-drama dominate in Asia and around the world; all of their industries have been created through strict discipline and grueling work hours.