The whole NHS just need reorganization and need more efficiency. It can improve much better even without inputting more money. If the system is not going to change, it will be getting better even you input more money. Inputting more money is just like to pour water into a bucket with a hole!
I don't agree the view that if you are not satisfied with the NHS service just go to private. I rather go for another way that we pay extra money directly to NHS to get value added service, i.e. Shortened waiting time, asking more tests which currently doctors are reluctant to give to you now but you think it is essential, choosing the doctor more capable, etc. but the cost is lower than go for private.
You pay the more tax to fund NHS you don't know where they spend money. I rather pay the value added cost to NHS to get the service I want. There are 2 benefits: 1. Release the financial burdens borne by NHS a bit 2. Get the service you want.