If we could take the US Fortune 1000 and convert them to full ownership by employees or the families of such people that would go a long way toward emproving profit efficiency and getting firms with sane ownership that wasn’t in the way and would allow a longer term horizon and better value and quality focus. This would mean a lot of the stock was at some point held by surviving spouses or retired employee who could of course divest at any point, but also by current employees. Managers and executives would be barred from holdings, and if they promoted into these positions would be divested or have the holdings frozen and voting rights cease until they retired or demoted- eventually only employees and former employees would hold stock and the firms would be taken private. This approach would require a change in the tax code.
These are pensions so they wouldnt have a bet the farm approach, and over time retirees would end up with chunk of holdingd in the firms they retired from and a chunk in high grade bonds and the rest in small and mid cap firms- over time outside large cap would be less available.