The Enlightened Nepotism.

When a ruler seeks for a good person to be provincial governor, or a company owner looks for the right candidate to fill an executive position, they love to appoint a relative. And understandably so: a relative is somewhat less likely to have conflicting interests.

There are, of course, thousands of cases when a relative does have a very different view on the direction the country or company should be following, and this conflict often results in nice people being hanged, shot, guillotined or, in our humane times, forced to retire. However, a complete strange is even more likely to raise a mutiny, hence the need for competent relatives.

Unfortunately, there's usually not enough relatives to control all key positions of a medium-sized corporation, let alone of a small country. But that can be changed even at the current level of technology, even within the monogamous society of ours and -- get this! -- preserve the Big Man's wife's figure.

The solution is simple: surrogate mothers. Even in the US, which isn't the cheapest place in the world, it currently costs about $100000 to get a new baby via a surrogate mother. Suppose the Royal Couple starts having children when the wife is 18 years old, which means one egg about every month for about 20 years. 20 years by 12 months = 240 children. And since the process includes IVF anyway, the fertilized egg could be allowed to divide once or twice and then implanted into a surrogate mother -- which will give use 480 or 1160 children, respectively at a price of 50 to 100 million dollars.

Needless to say, that the same technique can be applied to the children of the Royal Couple as well, which means that by the time they are in their 60-s, they'd have half a thousand children aged 20 to 40, plus some 2500 grandchildren of about 20 years old and innumerous younger grandchildren.

More than enough people to pass the torch to!