the inherent classism of kyriarchy and subaltern theory

This is a followup to a post from 2013,kyriarchy: redundant word of the day. At the time, I quoted Fiorenza: The theoretical adequacy of patriarchy has been challenged because, for instance, black men do not have control over white wo/men and some women (slave/mistresses) have power over subaltern women and men (slaves)." But I completely failed to pay attention to the implications of that use