While I think the original comment on a CEO, a peasant, and a gun to be crass, I want to note that society wasn't always valuing "shareholder value" so much.
First, I want all companies, regardless of who invests in them, to hold some level of social responsibility to the society around them. Sometimes layoffs are necessary, and companies can't maintain excess costs forever, but there's some value to society to maintain employment.
Second, investments that return a profit to their investors is great, and as an investor, it's something I would want. That said, it's unreasonable to expect exponential growth forever, AND it compromises their ability to focus on other principles. How much return on investment is enough before a company can focus on being a force of good? 10%, 100% 1000%, 1M%?
Third, as an investor, I question if paying execs so much more than rank-and-file employees is good. So thats another example principle. I assume a well paid exec is incentivized to increase short term value, while as an investor I value long-term growth. Having a healthy employee base full of bright talented workers (incentivized by top-tier salary) seems a better solution.