A friend of mine thought he had a well paid job in Australia, then moved to the UK to do contract work in a similar field to yours and earned 4.8 times as much

A friend of mine thought he had a well paid job in Australia, then moved to the UK to do contract work in a similar field to yours and earned 4.8 times as much with much less responsibility and stress. The exchange rate isn't as good anymore, but I would recommend the UK over the other options.