Prosecution Reform

Reasons why it isn't being done
1. In reality, it has already been done; you just don't like the results
2. Even if it is done, it won't help South Korea; only criminals will benefit
3. Lee Jae-myung has nothing to gain by fighting with the prosecution as President; if anything, it's a loss. Lee is not such a coward that he would lock away a legendary sword—which serves as both a shield to protect him and a blade to cut down his enemies—in a closet just because it feels ominous
4. There are too many other things to do; reforming real estate, prices, exchange rates, stocks, public livelihood, and the police is more important
5. If he does number 4, he could serve consecutive terms for 100 years, and even if he is re-elected after a massive revival through future science and technology, his approval rating would hit 105%