Looking at that list reminds me how utterly bonkers it all is.
I have two conditions I take pills for. The one entitles me to them for free, but the pills only cost a few quid a year anyway, besides which, if I didn't take them, I'd feel rough but nothing dire would happen. (Pituitary and thyroid aren't on talking terms, just random slanging matches, so the pharmacist acts as a go-between.)
The other doesn't entitle me to free prescriptions. I've checked NHS prices (the pills not the scrips) and the pills themselves cost the NHS about £120 year (plus the costs involved in repeating the scrips, dispensing etc.) If I had to pay for scrips for them, it wouldn't cost me a lot, but let's say I was younger, in work, didn't get free scrips, but was on a fairly low income, I might find myself prioritising other things such as food, fuel, rent, sanitary towels, travel costs to work etc. and skipping the pills. You could say buy a pre-payment certificate, but you have to be able to afford it up-front.
How much does it cost to keep the likes of me in the loony bin for a fortnight if I go mad or seriously crash moodwise? Around £3,500 a week, plus the costs involved in spotting I've a problem and getting me there. In all seriousness, depending on who spotted there was a problem, whom they told etc., that could involve anything from police to councillors to social services to - well, whichever public service people thought to phone or knock on the door of. Then there'd be some follow-up care. So we're probably talking at least £10,000.
Hmm. Somehow I don't find the sums add up right in terms of what it makes sense for the state to fund. Still, I didn't get a brilliant grade on my A-level maths, so maybe I missed the lessons on "How to do the sums on spending a bit to save a lot."