With such high salaries I'm not sure if there's any place on earth other than SF that can come close to the standard of living you will live with $48k in Indian metro city.
If you're spending your money on healthcare, a cook, chauffeur, maid, and housing, then sure; you can probably get better healthcare than in the US if you pay for it. But as I said elsewhere, if what you're interested in is retiring in Costa Rica, buying a fleet of DJI drones, or buying a berth on Starship to Mars, US$48k is just US$48k. Or even clothes.
If you're spending your money on healthcare, a cook, chauffeur, maid, and housing, then sure; you can probably get better healthcare than in the US if you pay for it. But as I said elsewhere, if what you're interested in is retiring in Costa Rica, buying a fleet of DJI drones, or buying a berth on Starship to Mars, US$48k is just US$48k. Or even clothes.