Singapore is a tightly run island nation where laws, policies and regulations get rigorously applied. Given that they are a developed nation, the rigorous application of well, everything (founding father figure was said to be a benevolent control freak) is assisted by networked computers. My guess is that the Singaporean police can catch KA pretty fast.
Meanwhile, Indonesia is the exact opposite- developing, large nation consisting of hundreds of islands. Thus, more room to get lost in the shuffle. Then factor in that after periods of internal conflicts, some Indonesian regions and the Federal government are autonomous. Thus, far more room for a fugitive to get lost in the shuffle.
As
@minneolo illustrated,
"It is hard to stop being yourself". Bali would be an obvious Indonesian choice for KA due to familiarity and the ability to be herself. But.... it might be too obvious.
I wonder if there are other areas of Indonesia that could be less famous, smaller "Balis" in Indonesia that offer Bali vibes and the social atmosphere that allows KA to be herself?
One can probably rule out KA in Ambon Province- known for conservative Islam, local autonomy, the ability enforce dress norms, and.... cane those who cant refrain from alcohol and gambling. But, not all of Indonesia is Ambon.