The phrase "voting with your wallet" is hilarious to begin with, because it admits that rich people have more voting power and implies that's how it should be.
Vote with you wallet is not about civic function it’s about getting what you want from the market place.
And yes rich people get more goods and services.. which is why people want to be rich?
So you're saying if a company is boycotted by most of its poor customers, the rich customers will subsidize the loss? Do you really think that will happen?
Companies need customers, and if they lose customers, they can go out of business. The saying doesn't mean "the bigger the wallet, the bigger the vote" but rather "boycott this company and do not be a customer."
Collectively “rich people” spend less than 50% of the total consumer spending so this isn’t actually true exactly.
If you mean an individual person then it really depends.