I spoke about this just the other night, supposedly a company wants to implement a city wide retina scan system for criminals and for opt-in people it would act as a payment gateway. We both agreed that a company that isn't controlled in some way by the people should not have that information because they can't properly be held accountable through due process. The government having that information isn't much better at all but if you have to choose between the lesser of two evils I'd pick the government.