Your whole argument seems to be that the Koch brothers engage in philanthropy so they're not bad.The Koch brothers may engage in philanthropy, but that does not excuse the unethical behavior. The political positions they support almost always seem to line up with their own financial best interests. They publish propaganda articles advocating for more tax cuts for the rich. They've also been attempting to convince people that climate change is a hoax... pretty convenient how they make billions of dollars in the petroleum related industries. In order to fund more tax cuts for themselves and their billionaire cronies, they're also trying to enact cuts to social security, medicare, and many other safety net programs.
It's almost like the Koch brothers have contempt for the notion of workers having rights, a voice, and making living wages. They went out of their way to support Scott Walker in stripping worker's of their collective bargaining rights.
Foghorn, you are a real libertarian, who believes in real libertarian principles. The Koch brothers are not. They're just greedy sociopathic billionaires
The Koch brothers also do not care about how they affect other people's lives. Their industries have caused cancer across entire neighborhoods. Their response, of course, is not to clean up their act, but to lobby congress for less stringent environmental laws.