Re: If a patient had chosen to use the NHS they had implicitly agreed that their data could be used
They also use it because they paid up front to use it. It's "free at point of use" and some people get treatment far beyond how much they paid in, the majority use it far less than the value they paid in over their lives. But everyone pays. Even if they don't use it and pay to go private instead. That's probably the best thing about it. Homeless? Got no money and no job? Fine, you still get the same care :-)