If you have a viable model by which the entire human race can plausibly work together to fund and implement this, the rest of us would love to hear it.

There's plenty that's flawed about capitalism, but the thing is that it works better than anything else we've so far thought of for providing actual incentives for people to push the envelope of what's possible and create new things in economically viable ways. If there were some way to equally effectively incentivize regulatory oversight - which we manifestly do not have in existing governmental structures - we'd be in solid shape.