Top engineers aren't that way when a company takes 100% of the proceeds and a boss takes all the credit; but this is still allowing engineers to get a 62.5% cut.
The trust issue is why local governments might be the best place to start:
(a) they know they're not technologists and can't evaluate 10x programmers. I can. I think I can either (i) establish that I can, or (ii) bring someone more established and better than I am to do the vetting.
(b) even if they fail, much of the money goes back into the city, which means it's not totally spilled on the floor. Fail case: those tech bozos made fools of themselves, but they ate at local restaurants for a couple years.
It wouldn't only be local investors. I don't want short-term investors in this, though. I'd take a Buffett-esque approach of having the share price around $50,000. Value investors only, because talent takes time to ripen.