Earlier quoted context omitted.
You might have noticed that I said the rich are smarter than in the past, but the ruling class are very clever. As you rightly point out there are plenty of dumb rich, but relatively few of these dumb rich are ruling. As for leaders who the figurehead is does not matter - ask yourself what do the rulers care more about; who is the POTUS or who is the head of the federal reserve.
Are the ruling classes more clever, or has technology and globalization allowed average cleverness to be more impactful than in the past?
The ruling class is both much clever than the past and technology and globalization has allowed their cleverness to result in more control.
In regards the level of control I am most impressed at how subtly it is used. To be able to shift the the share of production from 75% masses / 25% rich to 50% masses / 50% rich in 40 years with barely a peep is truly breathtaking. They have even been able to convince a large section of the population that this is all the fault of people with brown skin.