New Delhi, May 30 -- From Buenos Aires to Auckland, the world's ultra-wealthy are quietly building networks of second homes, foreign passports, and offshore contingency plans as tax pressures and existential anxieties reshape where the very rich choose to live.

From the prosperous neighbourhoods of Buenos Aires to the volcanic coastline of New Zealand, the world's ultra-wealthy are constructing a new kind of personal geography, one built not on a single home address but on a deliberately assembled network of jurisdictions, each chosen for what it offers when another might fail.

A record 142,000 high-net-worth individuals, defined as those holding more than one million dollars in liquid assets, relocated to new countries last year, accor...