Turns out, much like humans, Capuchin monkeys do NOT like feeling cheated or underpaid. This TED talk presents an experiment where one monkey is given a cucumber for the same work another monkey gets a GRAPE for-that's right, A FREAKIN' GRAPE. That's like 20k in the monkey world so you do the math. Watch for the full experiment by Frans De Waal. VIVA LA REVOLUCIÓN!