The only way workers get any say over corporate decisions about things like compensation, layoffs, stock buybacks etc. within the investment capitalism model is

The only way workers get any say over corporate decisions about things like compensation, layoffs, stock buybacks etc. within the investment capitalism model is if they are organized and control voting seats on the corporate board. Don't worry, implementing this as the standard in the USA will not result in "Marxist Communism" - it's the norm in Germany today, e.g. VW is controlled by a 20-seat supervisory board where unions control half the votes. The result is neither a shareholder's nor a worker's paradise, but a reasonable compromise.