Not really, as a hypothetical if your salary is 50% and your mortgage is 50% higher, it’s likely your free/spare cash is higher. I know that from personal experience from living in both Birmingham and Sydney. How you then choose to spend your free/spare cash is up to you but things tend to be higher in cost in higher earnings areas/cities/countries because those people have a higher surplus of spare cash. Globalisation is reducing this difference obviously because of ease of access but there is still the discrepancy.