They don’t need to at all. Capitalist armies are extremely inefficient. They cost too much and bring no profit compared to free markets. Reputation is part of running a company too. It‘s much to easy to compete with someone perceived as evil.
Discussion
Ok. Fundamental disagreement. Consumers don't care about evil they care about price, and those who can afford it care about quality.
Yes. Fundamental disagreement is awesome. Nice to have a discussion with you :)
To an extend. I think: If a specific line is crossed they usually do care about morals too.
And even if they don‘t: Who are we to tell them what to do?!