They GBC never said that "all of the disciples" are going to be gurus? This is a straw man argument. They said they are only 11, and the rest of us 5,000 have to accept that debauchees are gurus, or we will be banned, beaten and killed. OK there are now those who were voted in by the 11, they expanded the guru franchise business.
This is also basically what Mr. Stalin did by the way, "everyone" is going to have a big house, opulent facility, many servants, golden tableware etc. just like Mr. Stalin has. Ooops, well sorry, first we need to kill 23 million people, THEN, and I promise!!!! Everyone ELSE will ALSO have a big house and servants like I have! We simply did not accept the Stalin siddhanta, therefore we were a problem for these gurus. Here is what Srila Prabhupada actually said:
Śrīla Prabhupāda Says - [On leadership in his ISKCON society]
"...after you, who will take the leadership?" And "Everyone will take, all my disciples. If you want, you can take also. (laughter) But if you follow. They are prepared to sacrifice everything, so they'll take the leadership. I may, one, go away, but there will be hundreds, and they'll preach. If you want, you can also become a leader. We have no such thing, that 'Here is leader.' Anyone who follows the previous leadership, he's a leader. 'Indian,' we have no such distinction, 'Indian,' 'European.' "
Brahmānanda: They wanted an Indian to be the leader?
Prabhupāda: Yes. (laughs) "Everyone, all my disciples, they are leaders. As purely as they follow, they become leader. If you want to follow, you can become a leader. You are Indian. But you don't want." I told them that.
Tamāla Kṛṣṇa: Yes, they probably wanted to propose somebody who would take over our movement.
Prabhupāda: Yes. Leaders. All nonsense. Leader means one who has become first-class disciple. He is leader. Evaṁ paramparā-prāpta... One who is perfectly following... Our instruction is ara na kariha mane asa **. You know this? What is that? Guru-mukha-padma-vākya, cittete kariyā aikya, ara na kariha mane asa **.
Who is leader? A leader, to become leader, is not very difficult, provided one is prepared to follow the instructions of a bona fide guru.
[Room Conversation: Vṛndāvan 2 Nov 1977]