I have a problem with public funded universities and research in Germany. I really don’t like how professors own companies where everything comes from PhD stude

I have a problem with public funded universities and research in Germany. I really don’t like how professors own companies where everything comes from PhD students’ work. Basically they transfer state/grant money into personal pockets via paid work hours. Though I don’t know how this works in Switzerland. Another day I saw a long list of CERN technologies that I can license from them and they were not for free.