vote with one's feet
Indicate one's disapproval by walking out or emigrating, as in The service was so bad that we decided to vote with our feet, or Thousands of Hong Kong residents voted with their feet and left before the Chinese takeover. [Slang; mid-1900s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.