It's sort of like when you say "NAFTA grows the US economy but $1 trillion" and the guy who's job was outsourced to Mexico ask "Okay, but how does that help me make rent or buy groceries for my family?"?
Basic Income (and other welfare schemes) are like that too, except for the rich. They're absolutely worse off if the economy grows 10% but their personal wealth and income declines by 20%.
Personally I'm a fan of UBI, but I sell it as (1) welfare is the right thing to do, and (2) UBI is the most efficient way to do it.
I'd probably start with something less than $1,000/month though. I'd offer a package deal to employers and the rich that looks like this: the government will pay healthcare costs and provide $500/month to each adult and $250/month for each child, and in return we abolish the minimum wage.