Yeah but what If one of them has a kid. And that kid grows up learning all the Martian powers and comes back and destroys the catholic church? Actually that won’t be too bad

the power vacuum:

This is a good idea, once they go out to space in their rockets, we just revoke their passport to earth.

yeat the rich

The Marching Morons short story covers something like this.

And it’s the basis of Idiocracy.

https://en.wikipedia.org/wiki/The_Marching_Morons