This data should ideally be protected and owned by the individuals themselves - not the government, not the ad companies, not Google, not Facebook. As an individual who owns my data, I should have a right to decide who/when/how accesses my data.

More than a question of privacy, this is a question of next-generation user experience. If as an individual, my data from uber, google, facebook, visa, amazon is all in one place I can give selective anonymized access to it to different services that can leverage the collective data to provide better user experiences to me.