Netflix salary: $350,000 (minimum)
Tax as a single man in California with standard deduction: $133,000
Tax in Australia: $140,000
Price for a 3-bedroom house in Byron Bay: about $2m https://www.realestate.com.au/sold/property-house-nsw-byron+...
in SF: about $2m. https://www.zillow.com/homedetails/23-Madrid-St-San-Francisc...
Taxes can be lowered significantly in the USA if you have a stay-at-home spouse and children. Australia does not allow tax combining. Taxes can be lowered in both countries with real estate deductions (although in Australia only for investment properties).
The major advantage for Australia is that there is no demographic underclass or widespread poverty/homelessness, which is a major problem in SF. But costs for Sydney and associated areas are hyper-expensive, about the same as SF.
Sydney latitude: 33.4° South. SF: 37.7° North