If you expect individuals in One Piece to be held responsible for their crimes and to pay the price for their actions you have chosen the wrong manga.
Many of the antagonists in One Piece such as Crocodile, Wapol, Enel, Moria, Caribou and Caesar Clown have gotten away easely with all the atrocities they commited. Sengoku is treated as a good guy despite having willingly took part in the Buster Call of Ohara without any sign of remorse for that.
Even several of the Straw Hats and their allies are bastards who commited crimes, some particulary cruel and horrible, and will never face any real justice such as Robin who commited many crimes both during and before her time in Baroque Works, Mr 2 who too willingly chose to help Crocodile take over a country and commit many crimes in order to reach that goal, Kid and his crew who slaughtered many people for petty reasons, Law is known for his cruelty, Hancock commited many acts of piracy and heartlessly turned many people into stone and didn't care about the prospect of her island being attacked if she didn't go to Marineford, Judge and his sons are remorseless war criminals and tyrants with Judge having done a Mengelesque operation on his own wife and children, Bege and his crew are vicious and sadistic mobsters, etc...