kindly, @Magentaflies your post contains so many factual inaccuracies, it’s not possible to give your conclusions any weight.
Firstly, the UK did not chose to have a Royal Family. You’d be looking back at history and the divine right of Kings and the Reformation to argue your position here, but I don’t think your looking at this period of history and seeking to argue this.
Secondly, you immediately equate being a member of the Royal Fsmily with being at risk. This is not the case, and many members of the RF have no security, or only security for limited engagements. The RAVEC committee was formed to apply to members of the RF and other VIPs, determine risk, and determine security accordingly. Inherit in this, is the knowledge that risks will change at different times and for different events, and security might be higher or lower as needed.
You say we have a moral responsibility to pay for his security - leaving aside the many, many posts on this thread that have explained that we DO pay for his security, and the way in which it is determined what, when and how it will be paid for, a moral responsibilty means nothing. I may think there is a moral responsibility not to pay for it, but to pay for everyone’s tertiary education. Others may not, The UK pays for medical care via the NHS, other countries do not believe in doing so and either only partially subsidise it (eg Australia) or don’t subsidise it at all. Moral responsibility is an individual thing, and one persons morals (that then involve payment) can’t be imposed on the whole
country.
However in this case, the UK does pay for his security, and there is an expert body which determines when, where and how much should be in place at each time he is in the UK. So good news! You don’t need to find it disgraceful that we don’t fund it - because we do!