Karma is believed to work across lifetimes. Without it we'd not be free to make mistakes. So is more about reincarnation, and not about revenge, justice systems

Karma is believed to work across lifetimes. Without it we'd not be free to make mistakes. So is more about reincarnation, and not about revenge, justice systems or retribution. Misguided belief in karma may wither away at sense of necessary fairness (dharma), which is also karma.