But dear MSH, what is British politics but a story of power being in the hands of old people?
We're a society with a rampant fetish for old, esteemed people. People who have been around a long time. People who are "experienced", sometimes we even call them "national treasures". That kind of thinking has seeped into every group of public figures from TV presenters to artists to politicians. We conveniently ignore the fact that quite often these venerable, esteemed public figures that everyone can remember since they were kids actually have nothing valuable to say, or at least, nothing more valuable than a younger person.
But in the UK all you need to do in politics is stick around long enough, ideally in Westminster, so that you can become a Lord. It's not like you'd retire or something as you might do over in the states, oh my no. Instead you actually become a member of our Upper House, a reward for just existing long enough. Then we can never get rid of you. Ever. Not until you die. John Prescott's a lord now, so was Margaret Thatcher (Baroness). It's like you become a venerable figure for good, impossible to remove. No matter how worthless your opinions may be in comparison to other people, all that matters is that you've... been there long enough. Being a member of a successful party also helps.
I suppose given that we take pride in the longevity of the Queen and her extended family none of this should be surprising.