Financial freedom is about how much money you have and of course the way you manage it.
You are mistaking wealth with financial freedom, you can't have financial freedom without privacy - as I already described.
There's no way the government can't know how much your wealth when you're already a multi millionaire.
I am a multi millionaire and they don't know how much I have so there is a way.
Even you can find the loophole from tax regulation, you're still need to pay tax, even though not as much as before.
I don't have to pay tax from crypto government does not know about, only when I decide to trade it I have to pay tax from capital gains.
This is why you shouldn't use your name when you bought an asset, instead use your mother, father, or your son's name, so whenever your wife divorce you, you won't need to give 50% of your wealth.
That's not how it works and you would get additional penalty for hiding your assets, you can check plenty of cases like this.