The presence of a profit opportunity is what gets those politicians elected though. The system is fueled by money, and that money comes from corporations. It’s kind of a chicken and egg problem, but there exist politicians that can and do try to combat these companies. They’re just outnumbered by greedy, soulless husks. The politicians are the symptom in my opinion, because they are not per se greedy and evil, whereas publicly-funded corporations, by the nature of their fiduciary duty to stockholders, are by definition greedy.