The spoken word section at 6:24, at least the beginning of it, is taken from Noam Chomsky's Necessary Illusions, page 34.

"The general conception is that leaders control us, not that we control
them. If the population is out of control and propaganda doesn’t work,
then the state is forced underground, to clandestine operations and
secret wars;"

It deviates from the rest of the page, however. seems to say next: "[??] we may turn to violence, not toward democracy", or something like that. I couldn't find the exact audio source, but it's surely from one of Noam Chomsky's lectures. I looked through auto-generated transcriptions of two long lectures titled "Necessary Illusions" on youtube but didn't find the exact one.