What is the effect of immorality on an agent entrusted with duties requiring trustworthiness, such as the guardian of an orphan or a waqf administrator for the needy?

Primary text

If the agent is appointed for matters requiring trustworthiness, such as the guardian of an orphan or the administrator of a waqf for the poor, both the agent and the principal become terminated from their roles upon exhibiting immorality because they thereby lose the capacity for legal disposition.