They might "live off of tax payers money" but if it wasn't for them, your tourism would be pretty poor!
Do you know much about the UK? We have an incredibly rich history, beautiful and diverse scenery both in the cities and countryside as well as along the coast and we have a highly attractive capital city in England. Saying that people wouldn't come here
if we didn't have a bunch of people who walk about in fancy clothes and wave from golden carts is, frankly, effing ridiculous and slightly offensive.
You don't see any other European countries (or countries like yours) suffering due to a lack of royal family!
Why do people travel to countries like ours? They're attracted to bustling cities, night life, serene landscapes, leisure or sporting activities, architecture, history and culture. The fact that the country has a royal family may be a reason for some, but I highly doubt the majority come here solely for that and wouldn't otherwise. That's just deluded.
What do London tourists actually see of the royals? Their palace and a few guards along with the souvenirs with their faces on.
I've met several tourists from across Europe who've come here to see the lakes of Scotland or go surfing in Cornwall. When I lived up north I met people who'd come to see Sherwood forest because they had a thing about Robin Hood. There are races in Ascot, cathedrals and abbeys all over, spas in the cotswolds, pony treks in Devon, the London Eye and Tower Bridge, all night parties in London, Brighton, Manchester, Edinburgh...I've even met tourists in Portsmouth who aren't even on their way to anywhere, they just wanted to get some piccies of the Mary Rose before they went home.
I'm sick of the "tourism would die" argument. It doesn't hold water. Yes, London is the biggest pull, but London is so much more than the royal family.