that's just the way our society works i'm afriad. I don't have any living children, but still pay for schools. I have never called the fire brigade, but they are still there should i need them. I have never used social services, but will if i need to. i don't ever go to the library, yet i pay for the books.
I don't know the answer to how many drug addicts etc but i suspect you don't either?
the devolved nations decide what do do with their own money, and i think that they will come to regret the free prescriptions bit when they have to cut something else to pay for it, and i'm not sure that it's the right thing to even do when the NHS is in such trouble. I get that you are annoyed, but as i said, Now, when you need it, the NHS are paying over a tenner a month for the rest of your life so you can feel better