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Probably better for him if he doesn't have to pay taxes to Finland, since they're much higher.

He doesn't pay taxes to Finland because he's not living in Finland.

(Only certain countries like the USA tax their non-resident citizens.)

If you are a citizen of a country with a territorial tax system, but make your money in the US. Who taxes your income?

The US taxes income made in the US, or by US citizens outside the US.