If so, then it is not the business of workers to care about the interests of the owners or CEO. And the union is the best way to promote workers interests along with electing the pro-labor politicians. Everybody for his own.
It is not in the interests of the workers to care about the CEO per se, but it is in the best interests of the workers to care about the profitability of the company if they want to keep their jobs.
It is also in the best interest of the CEO to provide competitive wages and benefits for his workforce, so he can keep his skilled workers and produce a profit. Pay the workers too much, go out of business. Don't pay the workers enough, go out of business. The beauty of capitalism is that everyone, by serving their own interests, serves each others' interests as well.