We are rightfully horrified today that the US government used to do this to minorities (think the Syphillis tests on black guys in Alabama, among countless others). Thiel and these other Valley fuckheads think those days were fine, and are actually angry that they're not allowed to just toss some cash at some poor people and then run hilariously under-secured vaccine trials on them, because who cares if a few browns suffer and/or die if the end result is a safe vaccine for rich white people, right?
This is why the wealthy should be imprisoned and their wealth appropriated and redistributed. It has taken ages to get our government to where it even somewhat-responsibly regulates health and food procedures, and it fails at that, often, not due to some inherent evil or caprice of "gubbmint workers", but because greedy, capable shitheads like Thiel see the profit in doing it unsafely, and are willing and have the capital to influence media and elections to make sure the people exercise their "free will" and only elect their hand-picked mandarins who will gut protections and regulations as they see fit.
Of course, people are egregiously stupid, so they blame the government for this instead of the actually-evil wealthy fuckers who have the ability and means to to bend the government to their will to the detriment of the rest of us.
People. Please wake up. What you hate, what is ruining your life, is NOT the government. It's rich people. And a government fully funded and empowered by the people to prevent rich people from fucking with your life is your only hope you have of things ever getting better.