Oh, I don't think it necessarily has to await the next life (what e're that may be), though Putin and Kim et al will face that hurdle as we all must.

In this life, holding such a leader to account requires existential risk for you and those close to you. Pretty much an "our lives, our fortunes, and our sacred honor" level risk with a functionally greater likelihood that any but the last will be taken away from you. Not many are willing to play at those stakes.