Kṛṣṇa did not say Bhagavad-gītā to the loafer class. Kṛṣṇa said rājarṣi. Arjuna was a rājarṣi. So there are . . . because king would take responsibility. If the head man is taught very nicely everything about society, economic development and religion, if he is taught very nicely, then he can, I mean to say, introduce the ideas in the country. Therefore there was monarchy. The king would learn from the brāhmaṇas how to rule over the citizens. That was perfect. Imaṁ rājarṣayo viduḥ. Rāja and ṛṣi. Or rāja means king and ṛṣi means saintly person. So either the ṛṣis did know or the kings did know. Or a king who is not less than a ṛṣi, he could know and he could rule over. That is the Vedic injunction. Imaṁ rājarṣayo viduḥ. But without being rājarṣi, without being highly qualified, nobody can understand.
Therefore our Kṛṣṇa consciousness movement is trying to purify the people in general to the brāhmaṇa stage. Then they'll be, you'll be able to understand. Otherwise, na śaucaṁ nāpi cācāraḥ (BG 16.7). If he's not clean, if he has, he does not know how to behave, it is difficult. But Caitanya Mahāprabhu is still more kind, that "Never mind whatever you are. Chant Hare Kṛṣṇa and you become purified." This is Caitanya Mahāprabhu's movement. It doesn't matter whether, what you are. Chant Hare Kṛṣṇa and you'll be purified. Then you'll understand everything, what is God, what you are, what is your relation. This is Kṛṣṇa consciousness movement.