Royalty have long excelled at creatively exploiting the benefits of cheap local labour.

In the late 1930s, King Alexander I of Yugoslavia outdid himself at his summer residence near Slovenia’s Lake Bled. There, with blue bloods dropping in from across Europe, Alexander would host night golfing tournaments on his personal nine-hole course. With glow-in-the-dark golf balls yet to be invented, the king ordered torch-bearing peasants to line two of the fairways providing enough light to golf, and undoubtedly fuel for the local communist movement.