It's far saner to assume that all for-profit companies are in it to make money first and foremost, or will be eventually when they start to fail or have less scrupulous competition. From this starting point, and if you care to, you can then evaluate a company to get an informed opinion of whether or not they're doing "noble deeds", aligning with your interests, what you believe are societies interests, etc.

Assume your neighbours are noble by all means, but assuming all or even most large corporations are will lead to inevitable disappointment (or lessons learned).