If the laws are unethical then it doesn't matter if they gained the money legally. If they are legally allowed to exploit thousands of workers by giving them choiceless choices and are legally allowed to commit acts that are destructive to the environment and therefore, threaten the welfare of the world and humanity, then legality doesn't mean all that much. Furthermore, when people use their absurd wealth dollars to lobby politicians to shape the laws so that they can get away with as much corruption as possible within the limits of those laws, then the laws are not some bastion of justice. Moreover, their ability to lobby creates a system that reinforces their power through a symbiosis of the upwards flow of wealth and the law. The wealthy have the money to lobby politicians to enact laws that help further the conditions that put them in wealth and power in the first place. It's a rigged and corrupt system.