This collective consciousness is experienced by the Borg as "thousands" of voices they are collectively aware, but not aware of themselves as separate individuals. Consequently, they never speak in singular pronouns, referring to themselves when required as merely "Third of Five," for instance.
The Borg ingest only energy to drive their technological system via an energy conduit port. Their bio-chips synthesize any organic nutrients needed. Among the many advantages their collective consciousness affords them, the Borg hive-mind allows for instantaneous adaptations to shield and phaser frequency modulations in combat; they are also able to regenerate and repair their massive cube ship with the power of their collective thoughts alone.
The hive-mind drones do not register as individual life-signs when scanned, only as a mass reading and then at a bare minimum. The sick and injured are not healed but "reabsorbed" by the removal of the receiver piece, which leads to self-destructive dissolve.
When shipboard during dormancy in their regenerative mode, power is minimal.
DOESN'T THAT SOUND LIKE DEMOCRATS?