You (and several others here) have asked "Where are they going?"
I believe that you all are laboring under the mistaken impression that a wealthy individual seeking to escape the confiscatory taxes imposed (in the higher brackets) upon various forms of income in the United States doesn't have to find a "better" or "more-vital" country than the U.S. to flee to.
By that I mean: The refuge they seek needn't have a stronger economy, a sounder currency, a more-ambitious space program, a better educational system, an advanced health care system, etc.
Those criteria are of absolutely no interest to the wealthy individual seeking to flee from the gradual (or not-so-gradual) expropriation of his wealth through exorbitant taxes.
Rather, he seeks only a country where he can ensconce himself in something resembling a "gated community" - isolated, as much as possible, from the teeming masses of uneducated, poor, and criminal natives.
The most important aspect for the wealthy individual is that his new host-country will not tax him to death. It could, for example, have tax laws exempting all dividends and interest and capital gains earned on funds invested abroad.
All of the other services which you, subconsciously, have been thinking of (police protection, good schools, well-built streets, etc.) DO NOT HAVE TO BE PROVIDED BY THE STATE, THROUGH TAXES. Wealthy individual would prefer to provide them, themselves - and ONLY FOR THEMSELVES, out of their own pocket, but not into a public treasury.
They would rather that the State didn't interfer.
What these future tax exiles want, in principle, is a "do-nothing" government, that will allow them to enjoy their wealth in peace. These tax refugees would rather shop around for the best (if priciest) doctors, the finest Swiss boarding schools for their children, etc. The roads in their compounds will be immaculate. Their drinking water will be pure. They will pay for it themselves. But they will not be compelled to pay for such goods and services consumed by others (the poor).
As long as the government of his host-country is not so corrupt that he needs to fear being arrested on trumped-up charges by a police chief eager to extort his wealth from him, these would-be ex-pats have really very low expectations of their future host-country.
"Galt's Gulch" doesn't have superhighways, entangling alliances the world over, a 1st-rate educational system, military might, or moon shots. It doesn't need to offer those things, as long as individuals are free to go shopping and purchase them, themselves.
Regards,
Most countries have people in power, at all levels, just waiting for the delusional foreigners.