People living abroad for financial reasons

TAXEXILES

Those who relocate to avoid high taxes might be called this.

The clue "People living abroad for financial reasons" hints at individuals who move to another country to avoid high taxes, which is the definition of "tax exiles." The answer combines "tax" and "exiles" to describe those who leave their home country for tax benefits. It’s a straightforward term without wordplay, directly referencing a well-known financial practice.