I recall reading an article that for some companies in germany, the board-level employee representative have successfully negotiated during the GFC, to not have layoffs, but instead collectively took a pay cut and survive through the difficulties. The company got to retain the talents and save on the costs of retraining etc.
Having a dissenting voice can lead to better ideas. However, if the intention is to prevent employees from being fired even when it is in the best interest of the shareholders, then this employee representation is only going to decrease the shareholder value, and ultimately the profitability of the company.
> collectively own a non-trival amount of corporate stock.
how do these stock get granted? Because if the employees themselves pay for the equity, then they're part owners. If they don't actually pay, then they'd be usurping control in a way that is not fair to those paying the equity.