It's a collective action problem: it can't be solved by individuals like this. All you'll achieve is complicity in wage theft. A viable approach might be to prefer doing business with companies who promise their workers a good wage, but this requires that your local businesses actually make that commitment. To get that, you'll have to go outside the abstraction of the market, and actually talk to decisionmakers within the businesses. (This is sometimes called "activism".)
It's a collective action problem: it can't be solved by individuals like this. All you'll achieve is complicity in wage theft. A viable approach might be to prefer doing business with companies who promise their workers a good wage, but this requires that your local businesses actually make that commitment. To get that, you'll have to go outside the abstraction of the market, and actually talk to decisionmakers within the businesses. (This is sometimes called "activism".)