I'm intrigued as to the framing of your post. You seem to be positing that it's entirely expected and understandable that wealthy individuals in well functioning systems should commit fraud to the detriment of the system that brought them their wealth. That seems counterintuitive to me, at least.
If we're talking about wealth not income, then no, not really. We don't usually think of asset seizure as "taxes". In other words, one "taxes" flows (like capital gains and wages) and "siezes" stocks (like bank deposits and equity).
"You seem to be positing that it's entirely expected and understandable"
I wasn't making value judgement, but yes, if you look at it with the assumption these wealthy individuals are cold, calculating, self-interested actors, then it's "expected and understandable" to me.
"That seems counterintuitive to me, at least."
I think you're using "intuitive" as a shorthand for "the way things ought to work in a righteous world", where I find incentives and disincentives to be a more intuitive way of understanding the world.
"wealthy individuals in well functioning systems should commit fraud to the detriment of the system that brought them their wealth"
To be fair, it's not necessarily fraudulent to have offshore accounts or to conceal your identity (it can certainly be depending on the circumstances). Technically I have an "offshore" account, I just happen to be living outside the US and a US citizen. I also use mechanisms to conceal my identity when registering domain names, for example. Is it the same thing, no, but these people might not technically be doing anything illegal.
It isn't necessarily true that those systems "brought them their wealth" either. Plenty of them likely inherited wealth that was accumulated long before the current systems were put in place (granted, it could very well have been accumulated illegitimately 300 years ago).
(Again, I'm not saying any of this is how the world should work, I'm trying to look at the world dispassionately and describe how things seem to be)
At the level of wealth we're discussing, these individuals probably have to think about "diversifying" among nation-states. Instead of worrying about whether to short the tech sector, they're worried about a country being invaded and the new puppet regime deciding to nationalize the hydroelectric dam they financed. Or they may be worrying about whether their country of residence will pass a law that the biggest national telcom must sell the government a majority stake (i.e., their share) at a government-mandated price denominated in an inflating currency... with expert bureaucratic efficiency.
Nope. Legacy protection. Protection from state seizure and civil forfeiture. Protection from nationalization. Protection from a spouse or even your own children. Protection from takeovers of family businesses and assets.
There are a number of reasons why we might use offshore companies and apparent tax havens - while the taxes are an added sweetener, the main reason is that there is often concrete rule of law in these jurisdictions.
Did you know that for Russians and Chinese, the US is a tax haven? As long as you're not a US resident, you only pay US taxes (which can be easily optimized to be far below Russian or Chinese taxes). You enjoy a high degree of anonymity. You also get to gamble in the biggest equity markets of the world, which are backed by a strong financial system eager to lend you gambling money based on your assets.
Compare that to Russia, India or China, where your assets can be seized at a moment's notice, on the whims of some pencil pusher bureaucrat or judge.
So... Taxes?
I'm intrigued as to the framing of your post. You seem to be positing that it's entirely expected and understandable that wealthy individuals in well functioning systems should commit fraud to the detriment of the system that brought them their wealth. That seems counterintuitive to me, at least.