It's just another form of seed funding for ambitious start-ups.
And $30bn/yr is absolutely trivial compared to the opportunity costs of an economy geared more to financialisation and regressive wealth extraction than to productive engineering and invention.
This silly proposal is nothing more than socialized venture capital. We have real venture capital who invest in “far fetched” ideas already — and they have willing participants who know what they are getting into — not people being forced, literally at the point of a gun, through taxes.
Yes you will (according the basic theory of the idea).
Unfortunately, even though you will get a return, when you get it you will believe that you haven't had the return because it will take the form of $100k of life improvements that you will believe you "would have had anyway" without the investment.
You might even get $100k of cash, in the form of your salary increasing by much more than that, and costs of quality of life things increasing by less (enough to make the difference >$20k). But when it happens you will almost certainly attribute it to other causes.
And so, today, you will argue against the investment, it won't happen, and you will end up poorer than you would have been.
While believing you are richer, because $20k cash in the hand today feels more real than $100k quality of life cost differential improvements in future whose attribution is difficult or impossible to verify.
That's the theory anyway.
I think a plausible factor in the failures of trickle down economics to enrich the masses as much as hoped by those who advocate it, is wealthy groups of people acting so as to keep what wealth they have in their own control, away from others. And, over generations, perhaps ceasing to be wealth generators (e.g. inventors and industrialists) and becoming wealth controllers (e.g. "old money" families).
Widespread investing in lots of people isn't subject to the same problem, by definition. (Assuming those people are paid decently, rather than indentured servants to some capital controller).
Maybe trickle down actually works. Maybe we all got a return on it in invisible ways. Maybe things would be a lot worse for the median taxpayer than they are after the policy was enacted. How would we know for sure?
Just like when a VC or government grant agency gives you money, you can't simply invest it and live off the proceeds in those cases either.
With that ruled out, the $1-3MM is not really the recipient's money, and they are not really wealthy in the way you are comparing to other households.
If some people can't accumulate something they can't do bigger things as creators or create bigger markets as consumers.