the cost of the good you are buying is where the workers money comes from
if you (maybe not just you but like 1000s of people) bought something from a corporation, and their profits grow, some of the extra money that the company makes will go to the worker if they unionize for high wages (that the company can now afford to pay) or if the company is forced by the market to pay the workers more so they don't leave the company individualy. And if the company wants to expand they will have to pay more workers to make more products which overall pays them more (but not individually)
there is some trickle-down here and while it is not much its really incorrect to say it doesn't exist