Engage in the culture you are trying to shape. It's easy to criticize from the outside, but if you want to make a difference, you can't stay on the sidelines. Sometimes you've got to mud-wrestle. If you think you know what an ethical business is, make one. If you think you know what a good government is, get yourself elected.
Somebody makes popular culture.
It might as well be you. Live what you believe. This means not just who you vote for, but also what you buy, what you eat, where you live, how you raise your children, what you put your hand to. New technologies make it feasible to demand accountability from everyone you deal with. Protect this new power and grow it, and make use of it in the way you conduct every aspect of your life.