This is an amount that would be a meaningful change to most US states' gross annual economic output that we're talking about, and a few people control it. Sounds pretty centralized to me.
The fact that a handful of individuals have half a trillion dollars to throw at something that may or may not work while working people can pay the price of a decent used car each year, every year to their health insurance company only to have claims denied is insane.
Free movement of capital and the ability to identify promising projects and allocate our resources there are why our society is prosperous and why we are able to devote more resources towards healthcare than any society that has ever come before us.
This money is managed by small amounts of people but it is aggregated from millions of investors, most of these are public companies. The US spends over 10x that amount on healthcare each year.
It's a great thing that they can throw half a trillion at something that may not work. Every great tech advancement came from throwing money at something which might not work.
> fact that a handful of individuals have half a trillion dollars
This is disputed [1]. In reality, a handful of individuals have the capital to seed a half-a-trillion dollar megaproject, which then entails the project to raise capital from more people.
[1] https://www.wsj.com/tech/musk-pours-cold-water-on-trump-back...