//I would be prepared to pay ( a modest amount ) in order to get meaningful services ,...//
But if you are a tax/NI payer you are already paying quite an immodest amount. A lot of this, as touched upon here, is simply wasted. There is no point in simply providing the service with ever greater sums of money (which your modest contributions would add to). It will simply be frittered away.
Money is not the problem with the NHS. It would consume the country's entire GDP if it was provided with it and the outcomes it provides would scarcely change. In fact they would be very likely to deteriorate. At the end on 2022 there were over 34,000 more people working in the NHS in England than at the end of 2021. This included 4,000 more doctors and 9,300 more nurses. Yet by every measure, the outcomes for patients - waiting times, access to GPs etc. - was worse.