What is the main theme regarding power and propaganda in Animal Farm?

I think that one of the most basic themes of Orwell's work
is the idea that power and propaganda go together for governments that wish to
consolidate their power over the populace.  The idea of needing to consistently exist in
the minds of the body politic happens only through means of propaganda.  Orwell's point
is that politicians will stop at nothing to ensure that the propaganda machine
constantly appropriates all reality and makes it a political one.  Squealer's "spin"
infects all aspects of life on the farm.  Whenever there is a shortage in food, Squealer
renames it as "readjustments."  Whenever someone launches a legitimate complaint,
Squealer brings up the ghost of Jones and then Snowball.  Whenever there is suffering,
Squealer invokes the idea of how struggle is felt by all in the acknowledgement of
something better, larger, and more transcendental.  Propaganda is the means by which
power is consolidated for it is the means through which government denies individuals
the ability to think and act globally regarding their own predicaments.  In this, Orwell
makes clear that one gains greater power through propaganda, and if one covets it, the
ability to spread misinformation through propaganda becomes an essential reality to
those in the position of political power.