vote with your pocketbook
US /voʊt wɪð jʊər ˈpɑkɪtbʊk/
UK /voʊt wɪð jʊər ˈpɑkɪtbʊk/

1.
to express your opinion or support for something by spending or not spending money
:
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Many consumers decided to vote with their pocketbooks by boycotting companies with unethical labor practices.
•
If you want to see more sustainable products, you need to vote with your pocketbook and buy them.