Also, I would counter that in a firm, the legal and immoral loopholes that would give one party greater wealth would do so 1) at the expense of other parties inside the firm and 2) run the risk of bad optics / PR to institutional investors who look out for things like this when evaluating a firm.
Lastly, the aggregate of these factors is baked into the return on investment of a stock. In other words, I suspect that might be happening in firms that are making alot of money and providing healthy returns for shareholders. Alot less so at firms that are struggling and not providing much growth.
For instance, at the 2016 Alphabet meeting, they voted for Alphabet shareholders having one vote per share and adoption of a majority vote for election of the board. Those are the very core corporate governance oddities that Alphabet is using to allow the founders and Eric Schmidt to have total control of the company and Vanguard voted their shares towards better governance.
Obviously, since Eric Schmidt and the founders have the majority of the votes, these didn't pass, but they voted the way you would have liked and against management.