Since the increase in the number of the Emperor Saga's princes and princesses might have caused the Imperial court's fiscal tightness, it was a better way for the Emperor's bloodlines to allow these princes and princesses to become his subject earlier in order to ensure the prosperity of his descendants.
嵯峨天皇に皇子皇女が増え、朝廷の財政を逼迫させる基にもなることから、早くに臣籍降下することが皇胤にとって子孫繁栄の道であった。