I would actually say the opposite: many people I know (in the 20-28 years old age group) who work in IT and earn good salaries in their countries have said they

I would actually say the opposite: many people I know (in the 20-28 years old age group) who work in IT and earn good salaries in their countries have said they'd move if they can make much more elsewhere. I think its not just about tax benefits but also the actual potential salary.