And the neat part is that you can have agreements within a group of countries (say about five) to have them surveil your citizens and share what they find with you while you do the same for them.

or you do like EU and just hand over your own citizens' data to non-EU countries.

(for example: https://www.dw.com/en/eu-weighs-giving-us-data-for-fewer-tra...)

Technically true but as the commentator below you says, easily circumvented. Perhaps it's better to think of privacy/freedom of thought as a global human right...

The state does not make a difference. It is an illusion that the "own" citizens are worth anything to the state. You are workers, aka capital, nothing more.

The truth is that 'foreigner' is a term invented by states to create a distinction where there is mostly no difference. I have more in common with a normal citizen from elsewhere than I do with Elon Musk or Jeff Bezos.