If Xiao Xiong were merely incompetent, Emperor Huian would not have stripped him of his title in a fit of anger. However, by digging his own grave, not only did he condone Lady Wei's private issuance of loans with interest, but he also shielded her family's relatives who committed multiple evildoings, resulting in several lives being lost.
Such a person, who contributed nothing to the state, lacked personal virtue, yet held a high position and squandered the Court's resources, was not someone Emperor Huian could tolerate. Moreover, Xiao Ruiqing dared to commit fratricide; in Emperor Huian's heart, it was likely that any mistake his own son made was led astray by such an unscrupulous person. Not only was he unwilling to pardon this "chief culprit," but even the family members of the "chief culprit" would not have an easy time either.