Institutions forbid interests that could compromise impartial agents. [causal]
Organizations require agents to divest their stockholdings or place them in blind trusts, to develop rules of celibacy or, in the case of Plato's Guardians, prohibitions against family membership (that otherwise creates powerful intimate bonds that compromise norms of disinterestedness).
Shapiro, Susan P., The Social Control of Imper…, loc. 78