As well meaning as all of the employees at Google are, and as far as they'll go to do the right thing (far, in my experience), from what I understand of our legal system, it's really the role of government to protect you from corporations mis-purposing your data. The free market isn't meant to be a democratic institution, and while some top executives have a certain talent for aligning stockholders interests with those of their users, the system they operate within simply isn't designed with democratic responsibility in mind.