Before Saville died, there was only some unsubstantiated rumours of his sexual abuse and Saville had successfully taken out a superinjunction as well. You're looking at history backwards because at the time most people either didn't know about such rumours or didn't believe they were true.
We only had evidence once he died and had an inquiry too.
Rolf Harris case was not too long ago, but most people absolutely did not suspect Rolf of paedophilia.
AFAIK, the allegations against Mountbatten were and remain unsubstantiated.
Neither of these sets of allegations and cases suggests the Royal Family themselves were complicit in sexual abuse. Even Andrew's case doesn't suggest that. Knowing someone OR knowing of someone doesn't axiomatically mean a person knows or suspects them of being paedophiles.
It's absurd to state the British Taxpayer is "paying an obscene amount of money for paedophiles to walk amongst us". We're clearly not.
What you're doing here is using two different logical fallacies in an attempt to try to discredit the Royal Family, British State and the British people. Those fallacies are Guilt By Association Fallacy and Hasty Generalisation Fallacy.
As far as I can see, there was no reason for you to rant the way you did in this thread. Nobody was posting about Americans. 🙃