Perfect System
Of course spiritual dharma can stand on its own but for those who are conditioned here in the material world, means all of us, we need to work within a framework created by Krishna, given by Krishna and that is why Srila Bhakti Vinoda Thakura explains that even for the self-liberated soul, even for vaishnavas, very elevated vaishnavas, they respect and work within the system of varnasrama because it is created by Krishna, it is a perfect system. It is the system, one and only system in the material world whereby one can more easily advance in Krishna Consciousness, whereby society can function in its most ideal way.
– HH RP Bhakti Raghava Swami