It was 'the active side of infinity' that got me into this whole journey, to begin with. (Well David Icke's reference to it anyway)
In that same chapter, Don Juan introduces Carlos to the secret for taxing the flyer's mind: holding into the connection between the energy body and the physical body. He also makes references to being stuck on earth through reincarnation, and that unless we leave it can only get worst.
In other words, the flyers are able to manipulate and feed off our energy by perpetuating a sense of "split" inside of us: a split from our true energetic self by directing the mind to anything that perpetuates the idea of separation both individually and collectively: religions, fear of survival, fake currencies, fake teachers, the tax system, borders, racial identities ...etc
Interestingly enough, in astrology, Saturn's energy is understood as inducing separation in the psyche and it is also the ruling planet of rigid structures. Brett Stuart (in Moksha) makes reference to a system around the earth that acts like clockwork to stir and churn events and emotions on earth that produce the type of energy needed for the after-death harvest. It is possible that the hijacking of planets through the ring system (jupiter, saturn, uranus, neptune all have rings) and the introduction of the moon acts as this cosmic clockwork stirring change, wars, revolutions ect. In Gnostic writings, the planets are "the archons".
Yahwe based religions teach that God is outside you to perpetuate the split: while the creative force is the higher self: it needs to be reintroduced within and that's what taxes the parasites that refrain us from accumulating enough energy inside
... the flyers seem to act as facilitators to the after-death harvest by lowering the chances of becoming whole.