“You’ve had five years,” said Lord Gurgatron. “What have you accomplished?”

The little alien scientists beamed. “We’ve sabotaged many of the humans’ toilets to only flush halfway on the first attempt!”

“…And?”

“This will soon incite insurrection against their plumber overlords!”

“They are ruled by plumbers?”

“So our research indicates.”

This story is based on a title suggested by @RobertRacoon.