Maybe this has been done already and has been ineffective for some reason, but I guess the alternative is an organisation - maybe a different quasi-public insti

Maybe this has been done already and has been ineffective for some reason, but I guess the alternative is an organisation - maybe a different quasi-public institution - whose charter explicitly includes and emphasizes looking after the interests of institutions other than profit-making corporations? That is a thing that happens, and it has a real effect. Those organisational charters inevitably reflect some underlying ethical system, and I think the role of those ethics in influencing organisations and their members is still under-appreciated in some contexts (I'm certainly not saying that free market economics or libertarianism - for example - don't have any ethical system, by the way - more the contrary). For example, over here, picking maybe the most visible examples, the NHS, Channel 4, and the BBC - and many of the people who work for them are heavily influenced by the ethical ideas behind them.