For all the talk about bad incentive structures being the root of all evil in the world, EAs are, and I thought this even before the recent Altman situation, strikingly bad at setting up good organizational incentives. A document (even a founding one) with some text, a paper-wise powerful board with good people, a general claim to do-goodery is powerless in the face of the incentives you create when making your org. What local changes will cause people to gain more money, power, status, influence, sex, or other things they selfishly & basely desire? Which of the powerful are you partnering with, and what do their incentives look like?
You don't need incentive-purity here, but for every bad incentive you have, you must put more pressure on your good people & culture to forego their base & selfish desires for high & altruistic ones, and fight against those who choose the base & selfish desires and are potentially smarter & wealthier than your good people.