"
foreboding
And the machine grows parasitic
Who's gonna critisize the good
Recall the original instance: "machine grows idiotic...". In that particular stanza, the status quo had begun to fail. This stanza, however, outright takes the stanzas before it (which state that the revolution occurred, and that a new machine replaced the old one).
"And the machine grows parasitic": in the most laconic matter possible, the new machine has grown as bad as, if not worse, than the old one.
The critic who sparked the revolution in the previous regime is now the one who needs to be criticized.