That's already the case to a large degree, the system has been designed to keep companies private at the most lucrative stages and only make them "public" when they need to add leverage for the next thing.

The tippy top doesn't sell equity into public markets, but public markets let them borrow more depreciating fiat to buy more equity. Poors, via retirement accounts, buy that debt and get a fraction of the upside... if any, after inflation.

Saylor seems to get this in the Bitcoin context, let the poors buy the debt, keep the equity (coin).