The collection of so much personal data makes possible all sorts of abuses that are otherwise infeasible. The difference between corporations collecting & keeping massive amounts of data on the population of a state, and the same state's government doing exactly the same, is minor, when the government can buy access to much of that data or compel production of any of it by court order. It'd bother me if the government were running this kind of dragnet surveillance, so it bothers me that companies are, for this if for no other reason.