What would work is enough people willing to organise politically. Unions, people. This is a synchronization problem.
Yes. If Google knew, say, 25% of its highly-skilled engineering workforce would strike in the face of unethical business practices, Google would not engage in unethical business practices. Tech companies are assholes because we allow them to be.
There are also companies who happen to make money doing something more-or-less good - for example life-saving medical devices, and even a company like Roland, which makes music equipment. I think those things contribute to a meaningful life, and are a good place to land if you're jumping ship.