"Picture this", said a voice from within a thick cloud of cigar smoke. "A massive robot army, destroying everything in its path, with no inefficient human factor getting in the way. I'm picturing everything from tiny nanobots to huge, self-propelled aircraft carriers -"
"Picture
this", replied a voice from the other side of the table. The room is very dark, but we'll assume it's equally smoke-filled all over. "Metal fatigue. Impossible-to-find replacement parts. Corrupt mechanics. Little IKEA doohickeys that're always getting lost. And need I remind my humble opponent of the price of robot fuel these days?"
The mumblings of agreement were heartfelt, though politely restrained.
"No", the second voice continued, "what we need is something sturdy. Something that will leave a lasting impression on the luckless human caught in its way. Moreover, we need something economical, cheap to make and maintain."
A third voice jumped in. "We need zombies!"
"The hell we do!" The second voice was so indignant it momentarily lost its detached sarcasm. "I have six thousand golems brought all the way from Xian, ready to terrorize the population as soon as you sign the contract. They're 100% maintenance free, have no moving parts, require no fuel, and -"
"- have all the terrorizing ability of their close relations, the garden gnomes. Zombies, now! Is there anything as frightening as having your formerly alive loved ones lurching after you, demanding your sweet, juicy
Braaaaaiiinssss?"
"They're corpses! They decompose! My guys, now, you can bury them in the ground for a thousand years and they're good as new. Zombies rot."
"As my esteemed colleague points out", voice #3 smugly agreed, "zombies do rot. Leaving us with...?"
Oh damn. It had completely slipped his mind. "Skeleton warriors", voice #2 muttered weakly. "Very good! And they are?" "Awesome."
The chairperson's gavel finally succeeded in locating the table. "Very well, I've heard your sales pitches", she said and silently pushed the button opening the trap door and tipping speaker #1 (Robot Seller Guy. Really, imagine the carbon footprint.) into a vat of acid, "Of course there won't be a vote, we're not a democratic organization. So my decision is we, the Evil Coalition, make the zombies our Horde of Doom."