You don't know if the next company will either and what you should be doing is starting your own company to compete with similar values. If enough people start standing up to these companies then these companies lose their power. Don't fall for the trap of believing you are powerless. You have power but you must band together with others who share similar values. That's why ALL moral people must boycott these companies. Don't work for them. Don't use them. Band together with like-minded people and create competing companies for people who're more like you.

It's not easy. You are fighting a war and war is not easy. If you take the easy route you will only lose in the end.