The Plant technology in Trigun is a control apparatus masquerading as infrastructure.
Not because the creators consciously designed it that way, but because they built the visual and narrative grammar of their anxieties directly into its mechanics.
Rem doesn't suppress her emotions to make the Plant work — she suppresses them because the Plant's existence demands it. Every close-up of Rem's face in the flashbacks shows the same flattened affect, the same absence of affect that Japanese corporate culture demanded from employees in the 1990s bubble economy.
Watch the Plant itself in any establishing shot — it's not a machine but a fragile biological entity that responds to human psychology the way a hostage responds to a hostage-taker. Knives demonstrates this explicitly, his emotional volatility destabilizing multiple Plants simultaneously. The show treats emotional authenticity as a threat to survival infrastructure, which contradicts Vash's entire philosophical project (his endless talk about choosing life, about refusing to kill, about emotional honesty), yet Trigun never reconciles the contradiction. It can't, because the worldbuilding reveals what its ideology can't admit: decentralized power requires centralized psychology. The Plants can't coexist with free humans, they require either Rem's submission or Knives's dominion.
There's no third option the show can imagine — and this wasn't utopian thinking about sustainable energy but dread disguised as technology.
Watch Trigun episode 25 ("The $$60 Billion Double Dollars") with focus on Rem's voiceover explaining the Plant suppression system—listen specifically for how she describes emotional containment not as a side effect but as the primary function, then cross-reference with interviews from Madhouse Studio about 1990s Japanese workplace psychology to see what they were actually building.
Read Mitsuhiro Yoshimura's interview in the Trigun Maximum artbook about why Plants were designed as biological rather than mechanical systems—he discusses the specific decision to make them vulnerable to human psychology, which wasn't a biological necessity but a narrative choice reflecting anxieties about whether sustainable systems could ever be truly autonomous from human control.