They also happen to be designed by humans, and if you're just begging to have the system fix people's beliefs about corporate greed for you but don't think people themselves are at fault I have no idea why you'd think the systems would be fixed.
Always these complains about corporations or systems or institutions, the responsible person is never "I". If you're unwilling to take responsibility for your institutions why do you think they'd fix your problems? The beauty is people always get the institutions and rulers they deserve, it's not some mysterious system that allows these things to happen, it's you and I.