My only issue with the monarchy is you can't really usurp them anymore. In the good old days I could round up a bunch of my mates, storm Buckingham Palace, chuck old Queeny off the roof and take the throne for myself. Now I'd probably get arrested before even setting off!
As such I'd be happy for them to stay as long as there was a contest once a year to challenge them. I've already planned it out, it's called The Usurper's Games and the rules are as follows.
Every year the ruling monarch get to select a secret champion to represent them in the final - no one gets to know who the champion is or what the final challenge will be until the very end.
There will be preliminary regionl rounds, open to everyone and consisting of wipeout style challenges (these would be split into categories and tailored to ability so we don't end up with a bodybuilder competing against a 70 year old woman). There will be a total of 256 regional winners who go to the finals.
Once regionals are done we move on to the finals. Where the 256 regional winners will compete in a completely random set of knock out events. One week it might be chess, the next might be f1 racing, the following rodeo riding, there really is no limit to what might happen. But over a period of 8 weeks these 256 contenders will be whittled down to 1 ultimate usurper.
The ultimate usurper will then have the right to challenge the queen's champion in the queen's event. So we might have Joe Bloggs fighting Anthony Joshua in a boxing match, Joan Bloggs playing Joanna Konta at tennis or Jimmy Bloggs trying to out cook Heston Blumenthal.
If the usurper wins the queen's challenge they become king or queen and the current monarch and their family is demoted back to normal life.
If we can't have this then I'm all for abolishing the monarchy.