Not spending money at Target is not voting with your wallet. Voting with your wallet is the spending you do at a business that isn't Target instead.

However voting is different. We don't vote for a policy (although that is a common misconception.) The collective power of voting is often voting against a person/party : voting them out.

We spent money on goods/services we choose, and receiving money is a very strong signal to a business. Not spending money is an extremely weak signal.

Opposites.