I still don't understand why they can't have a system whereby medicines specifically needed for lifelong conditions are exempt, but occasional medicines are still charged for. I have glaucoma - 4 types of eye drops for life. My wife has MS. 3 tablets plus daily plus a weekly injection for life. All of those should be exempt. Then, if we need an odd course of antibiotics (for example) we still pay.
They already exempt some conditions, so it wouldn't be a great stretch.
Personally I think prescription charges are a good idea - they highlight that nothing is "free", and hopefully discourage some waste.
I would be curious if there's been any research (as opposed to Daily Mail headlines) as to whether people who don't pay charges are any more wasteful than those who do.